David's Astronomy - Astronomical Transients 2023

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Astronomical Transients - 2023

Transients
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Transients
2024

This page documents observations and images of Astronomical Transients (AT) with discovery dates in 2023.
(Note: Supernovae in 2023 are presented on a separate page : SN 2023 )
(Note: Some images may roll over into the following year)

Galactic Transients (2023)
     Name, type, discovery date

AT 2023cz - CV Type Transient (2023-01-08)

AT 2023ds - CV Type Transient (2023-01-08)

AT 2023em - CV Type Transient (2023-01-10)

AT 2023eu - CV Type Transient (2023-01-10)

AT 2023ev - CV Type Transient (2023-01-09) - Attempt

AT 2023fm - CV Type Transient (2023-01-10)

AT 2023in - Type YSO? Transient (2023-01-11)

AT 2023nf - CV Type Transient (2023-01-14)

AT 2023qt - CV Type Transient (2023-01-14) - Attempt

AT 2023rt - CV Type Transient (2023-01-15)

AT2023ru - CV Type Transient - Attempt

AT 2023us - Transient (2023-01-16)

AT 2023vn - Type ulens? Transient (2023-01-16)

AT 2023vp - CV Type Transient (2023-01-16)

AT 2023vq - Type YSO? Transient (2023-01-16)

AT 2023ati - Transient (2023-01-23) (Attempt)

AT 2023ayf - CV Type Transient (2023-01-26) - Attempt

AT 2023bji - Nova Type Transient (2023-02-05)

AT 2023bml - Type MP Transient (2023-02-09) (non-detection)

AT 2023bso - CV Type Transient (2023-02-13)

AT2023clo - CV Type Transient, V0476 Cyg (2023-02-20)

AT 2023cmu - CV Type Transient (2023-02-22)

AT 2023csv - Type YSO? Transient (2023-03-02)

AT 2023ctk - Type YSO Transient (2023-03-03)

AT 2023crg - CV Type Transient (2023-02-28) (non-detection)

AT 2023cts - Type YSO? Transient (2023-03-04)

AT 2023ctt - CV Type Transient (2023-03-04)

AT 2023ctx - CV Type Transient (2023-03-05)

AT 2023ctz - CV Type Transient (2023-03-05)

AT 2023cub - Transient (2023-03-06)

AT 2023cuo - Type ulens? Transient (2023-03-07)

AT 2023cuy - CV Type Transient (2023-03-07)

AT 2023cuz - Type YSO Transient, UY Aur (2023-03-07)

AT 2023cvz - CV Type Transient (2023-03-07)

AT 2023cwd - CV Type Transient (non-detection)

AT 2023cxz - CV Type Transient (2023-03-12) (non-detection)

AT 2023dnz - Type ulens? Transient (2023-03-11)

AT 2023dwm - CV Type Transient (2023-03-24)

AT 2023efy - CV Type Transient (2023-03-24)

AT 2023eid - CV Type Transient (2023-03-28)

AT2023elx - CV Type Transient (2023-03-30), in NGC 2345

AT 2023exh - Transient (2023-04-02)

AT 2023gde - Nova Type Transient (2023-04-10)

AT 2023gqc - Type ulens? Transient (2023-04-17)

AT 2023htu - Type ulens? Transient (2023-04-29)

AT 2023hsf - Transient (2023-05-08) (Attempt)

AT 2023huk - Transient (2023-05-08) (Attempt)

AT 2023hxd - CV Type Transient (2023-05-11)

AT 2023ima - Type ulens? Transient (2023-05-01)

AT 2023ipb - Transient (2023-05-13) (Attempt)

AT2023jbs - Transient, PT And (2023-05-19)

AT 2023otv - Transient (2023-08-04) (Attempt)

AT 2023pfd - Transient (2023-08-13)

AT 2023pmt - CV Type Transient (2023-08-15)

AT 2023qou - CV Type Transient (2023-08-20) (Attempt)

AT 2023qun - Transient (2023-08-25)

AT 2023rao - Transient (2023-08-16)

AT 2023rbs - Type HPM Transient (2023-08-31)

AT 2023rfq - Type YSO? Transient (2023-08-24)

AT 2023rgi - Type ulens? Transient (2023-08-27)

AT 2023rsr - CV Type Transient (2023-09-04) near NGC 947

AT 2023rud - Transient (2023-09-08)

AT 2023sqn - CV Type Transient (2023-09-11) (no detection)

AT 2023srv - CV Type Transient (2023-09-16) - Attempt

AT 2023srw - CV Type Transient (2023-09-16)

AT 2023tjz - Transient / Carbon Star (2023-09-17)

AT 2023tki - Type XRB Transient (2023-09-19)

AT 2023tow - Nova Transient (2023-09-20)

AT 2023ttx - CV Type Transient (2023-09-27)

AT 2023tvi - CV Type Transient (2023-09-29) near NGC 6834

AT 2023txn - CV Type Transient (2023-09-29)

AT 2023tws - CV Type Transient (2023-10-01)

AT 2023twu - Type HPM Transient (2023-10-01)

AT 2023uzx - CV Type Transient (2023-10-13)

AT 2023vqb - Type ulens? Transient (2023-10-16)

AT 2023vww - CV Type Transient (2023-10-27)

AT 2023wba - CV Type Transient (2023-10-29) (Attempt)

AT 2023wbv - CV Type Transient (2023-10-30)

AT 2023wox - Type YSO Transient (2023-10-28)

AT 2023wue - Transient (2023-10-28)

AT 2023wvm - CV Type Transient (2023-11-06) - Attempt

AT 2023wvl - CV Type Transient (2023-11-06)

AT 2023xum - Type CV? Transient (2023-11-14)

AT 2023xvv - CV Type Transient (2023-11-02)

AT 2023xzr - Type YSO Transient (2023-11-08) in M42

AT 2023ydp - CV Type Transient, FO Aql (2023-11-14)

AT 2023yen - CV Type Transient (2023-11-16)

AT 2023yvv - CV Type Transient (2023-12-04)

AT 2023yyz - Type YSO Transient (2023-12-01)

AT 2023zzs - CV Type Transient (2023-12-12)

AT 2023aais - CV Type Transient (2023-12-16)

AT 2023aaky - CV Type Transient (2023-12-15) near NGC 957

AT 2023aanv - CV Type Transient (2023-12-19)

AT 2023aaur - CV Type Transient (2023-12-20)

AT 2023abtv - CV Type Transient (2023-12-26)

AT 2023acjp - CV Type Transient (2023-12-31)

Extragalactic Transients (2023)
     Name, type, discovery date, host galaxy (if relevant)

M31 Transients

AT 2023U - Transient (2023-01-03) in M31 (Attempt)

AT 2023ax - Type FeII Transient (2023-01-06) in M31 (Attempt)

M31 2023-02a? - Candidate Nova (2023-02-07) in M31

M31 2023-03a? - Candidate Nova (2023-03-27) in M31

AT 2023gvz - Transient (2023-04-26) in M31

M31 2023-05b? - Extragalactic Nova, AT2023ksu (2023-05-28) in M31 (Attempt)

AT 2023trk - Extragalactic Nova (2023-09-26) in M31

AT 2023ttu - Transient (2023-09-29) in M31 (Attempt)

M31 2023-10a? - Extragalactic Nova (2023-10-01) in M31

AT 2023ufj - Extragalactic Nova (2023-10-06) in M31

AT 2023uri - Extragalactic Nova (2023-10-11) in M31

AT 2023veq - EGN Type Transient (2023-10-16) in M31

AT 2023yij - EGN Type Transient (2023-11-23) in M31

AT 2023yoa - EGN Type Transient (2023-11-27) in M31

AT 2023yqt - EGN Type Transient (2023-12-03) in M31

M33 Transients

AT 2023bne - EGN Type Transient (2023-02-10) in M33

AT 2023nou - Transient (2023-07-20) in M33

M33 2023-11a? - Unconfirmed Nova (2023-11-05) in M33 (Attempt)

AT 2023ypg - EGN Type Transient (2023-11-29) in M33

Other Extragalactic Transients

AT 2023by - Transient (2023-01-07) in IC 1501

AT 2023aov - Transient (2023-01-25) in IC 1525 (Attempt)

AT 2023apy - Transient (2023-01-12) in NGC 5433

AT 2023axn - Transient (2023-01-27) in NGC 4666

AT 2023brc - Transient (2023-02-13) in M31 (Attempt)

AT 2023cik - Transient (2023-02-16) in SDSS Galaxy

AT 2023clc - Type MP Transient (2023-02-22) in CGCG 217-021 (Attempt)

AT 2023clx - Type TDE Transient (2023-02-22) in NGC 3799

AT 2023cpp - Transient (2023-02-17) in NGC 4900

PSN J11283070+5833456 - Transient (2023-03-29) in NGC 3690

AT 2023ews - Transient (2023-04-09) in UGC 4417

AT 2023exk - Transient (2023-04-10) in NGC 1752

AT 2023iez - Transient (2023-05-13) in LEDA 1311625

AT 2023jpp - Transient (2023-05-28) in NGC 513 (Attempt)

AT 2023mlt - Transient (2023-07-06) in NGC 5297 (Unconfirmed)

AT 2023nbs - Transient (2023-07-13) in CGCG 420-018

AT 2023och - Unconfirmed Transient (2023-07-26) in NGC 1461 (Unconfirmed)

AT 2023pow - Unconfirmed Transient (2023-08-15) in NGC 1640 (Unconfirmed)

AT 2023qoo - Afterglow Type Transient (2023-08-18) from GRB 230818A (Attempt)

AT 2023qzg - Transient (2023-08-28) in UGC 8927 (Attempt)

AT 2023rcj - Type QSO Transient (2023-08-19)

AT 2023rpu - Transient (2023-09-07) in UGC 4992

AT 2023rrr - Type QSO Transient (2023-09-02), QSO J0136+4751

AT 2023see - Type HP Transient (2023-09-12) in CGCG 462-013 (PGC 9313) (Unconfirmed)

AT 2023seo - Transient (2023-09-13) in NGC 1272 (Attempt)

AT 2023sqw - Transient (2023-09-15) in NGC 205 (M110) (Unconfirmed)

AT 2023tdi - Type BL Transient, QSO B1028+511 (2023-09-15)

AT 2023tsk - Type BL Transient (2023-09-25)

AT 2023uhx - LRN Type Transient (2023-10-07) in NGC 3893

AT 2023uma - Transient (2023-10-09) in NGC 7427

AT 2023uta - Type SLSN-I Transient (2023-10-12) in LEDA 213371 (Attempt)

AT 2023vqz - Type QSO Transient (2023-10-16) in WISEA Galaxy

AT 2023vss - MP? Type Transient (2023-10-24) in NGC 924

AT 2023ycc - Transient (2023-11-12) in NGC 5395

AT2023aaiv - GRB Afterglow Transient (Attempt)

Galactic Transients (2023)

AT 2023cz - CV Type Transient (discovered 2023-01-08)

AT 2023cz (Pisces)
AT 2023cz (Type: CV) discovered 2023-01-08.461 UT by MASTER
Alias: MASTER OT J011250.33+320817.5
Discovery Mag 14.6 (Clear Filter)
vs Prior Non-Detection limiting mag 20.3
( TNS 2023cz )

AT 2023cz - 2023-11-06 (T+302.4d)
Image below (2023-11-06.908) was taken 302.4 days after discovery of 2023cz
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +16.90 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-06 21:52 UT (#1161022-26)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cz - 2023-12-16 (T+342.3d)
Image below (2023-12-16.744) was taken 342.3 days after discovery of 2023cz
Position of reported transient (faint, brightening ?) is shown by white cross-hairs
Measured magnitude +16.01 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-16 17:54 UT (#1173012-14)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ds - CV Type Transient (discovered 2023-01-08)

AT 2023ds (Cygnus)
AT 2023ds (Type: CV) discovered 2023-01-08.458 UT by Gaia
Alias: Gaia23ady
Discovery Mag 13.63 (G-Gaia Filter) vs Historic magnitude 13.84
Galactic plane star brightens by 0.25 mag, previous event seen
( TNS 2023ds | Gaia23ady )

AT 2023ds (T+3.8d)
Position of reported transient is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-01-12 06:05 UT (#1085128-32)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ds - 2023-01-09 (T+1.3d)
Image below (2023-01-09.799) was taken 1.3 days after discovery of 2023ds
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +13.62

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-01-09 19:14 UT (#1084039-43)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ds - 2023-01-12 (T+3.8d)
Image below (2023-01-12.251) was taken 3.8 days after discovery of 2023ds
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +13.59

AT 2023ds - 2023-02-13 (T+35.7d)
Image below (2023-02-13.192) was taken 35.7 days after discovery of 2023ds
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +13.65

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-02-13 04:39 UT (#1097245-49)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ds - 2023-02-14 (T+36.7d)
Image below (2023-02-14.198) was taken 36.7 days after discovery of 2023ds
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +13.67

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-02-14 04:47 UT (#1098209-13)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023em - CV Type Transient (discovered 2023-01-10)

AT 2023em (Cygnus)
AT 2023em (Type: CV) discovered 2023-01-10.208 UT by Gaia
Alias: Gaia23aeo
Alerting Magnitude 15.97 (G-Gaia Filter)
vs Historic magnitude 16.35 +/- 0.10 SD
Erratic brightening in Gaia source
( TNS 2023em | Gaia23aeo )

AT 2023em - 2024-02-24 (T+410.0d)
Image below (2024-02-24.192) was taken 410.0 days after discovery of 2023em
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude, AT 2023em + adjacent star +15.66 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 04:39 UT (#1190263-67)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023em - Detail (T+410.0d)

Annotated CCD Image (175% size, linear scale, cropped)
Image details as above

AT 2023eu - CV Type Transient (discovered 2023-01-10)

AT 2023eu (Cygnus)
AT 2023eu (Type: CV) discovered 2023-01-10.449 UT by Gaia
Alias: Gaia23aew
Discovery Magnitude 15.24 (G-Gaia Filter)
vs Historic Magnitude 16.56 +/- 0.49 SD
Outburst in known CV
( TNS 2023eu | Gaia23aew )

AT 2023eu - 2023-11-09 (T+303.4d)
Image below (2023-11-09.817) was taken 303.4 days after discovery of 2023eu
Position of earlier reported transient (faint) is shown by white cross-hairs
Measured Magnitude +16.79 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 19:39 UT (#1164033-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023eu - Detail, 2023-11-09 (T+303.4d)

Annotated CCD Image (175% size, linear scale, cropped)
Image details as above

AT 2023ev - CV Type Transient (discovered 2023-01-09), Attempt

AT 2023ev (Aries)
AT 2023ev (Type: CV) discovered 2023-01-09.657 UT by Gaia
Alias: Gaia23aey, ASASSN-17ki
Discovery magnitude 16.13 (G-Gaia Filter)
vs Historic Mag 18.67 +/- 0.89 SD
3.5 mag outburst in known candidate CV ASASSN-17ki
Gaia, 2022-08-25 08:41, mag 18.86
Gaia, 2023-01-09 15:47, mag 16.13
Gaia, 2023-02-05 23:13, mag 18.89
Gaia, 2023-09-04 09:49, mag 19.11
( TNS 2023ev | Gaia23aey )

AT 2023ev - 2023-11-15 (T+310.2d)
Image below (2023-11-15.886) was taken 310.2 days after discovery of 2023ev
Position of earlier transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection ?, Limiting Magnitude +18.5 (Clear Filter)
CV Transient has most likely faded to around Historic Levels (~18.67)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 21:19 UT (#1167146-50)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ev - Detail, 2023-11-15 (T+310.2d)
Square root scale / Negative Image
Position of earlier transient (source faded but just detectable) is shown by black cross-hairs
Estimated Magnitude +18.4 (Clear Filter)

Annotated negative CCD Image (100% size, square root scale, cropped)
Image details as above

AT 2023fm - CV Type Transient (discovered 2023-01-10)

AT 2023fm (Cygnus)
AT 2023fm (Type: CV) discovered 2023-01-10.703 UT by Gaia
Alias: Gaia23afb
Discovery Mag 13.49 (G-gaia filter) vs Historic magnitude 13.75)
0.25 mag rise in Gaia source in the galactic plane
( TNS 2022ddt | Gaia23afb )

AT 2023fm - 2023-01-27 (T+16.5d)
Image below (2023-01-27.204) was taken 16.5 days after discovery of 2023fm
Position of reported transient (distinct) is shown by white cross-hairs
Measured mag +13.45

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-01-27 04:56 UT (#1091152-54)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023fm - 2023-01-28 (T+18.1d)
Image below (2023-01-28.781) was taken 18.1 days after discovery of 2023fm
Position of reported candidate nova (distinct) is shown by white cross-hairs
Measured mag +13.43

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-01-28 18:47 UT (#1093012-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023fm - 2023-02-13 (T+33.5d)
Image below (2023-02-13.209) was taken 33.5 days after discovery of 2023fm
Position of reported transient (distinct) is shown by white cross-hairs
Measured mag +13.49

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-02-13 05:04 UT (#1097259-63)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023fm - 2023-02-14 (T+34.5d)
Image below (2023-02-14.213) was taken 34.5 days after discovery of 2023fm
Position of reported transient (distinct) is shown by white cross-hairs
Measured mag +13.56

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-02-14 05:09 UT (#1098234-38)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023in - Type YSO? Transient (discovered 2023-01-11)

AT 2023in (Cygnus)
AT 2023in (Type: YSO?) discovered 2023-01-11.955 UT by Gaia
Alias: Gaia23afz
Discovery magnitude 16.27 (G-Gaia filter) vs Historic Mag 16.82
Candidate YSO in 0.6 mag outburst
( TNS 2023in | Gaia23cse )

AT 2023in - 2023-10-22 (T+283.9d)
Image below (2023-10-22.886) was taken 283.9 days after discovery of 2023in
Position of earlier reported transient (faint) is shown by white cross-hairs
Measured magntitude +17.23 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 21:25 UT (#1158091-95)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023in on Transients 2023 Page >>

AT 2023nf - CV Type Transient (discovered 2023-01-14)

AT 2023nf (Gemini)
AT 2023nf (Type: CV) discovered 2023-01-14.596 UT by Kojima
Discovery Magnitude 13.2 (Clear Filter)
( TNS 2023nf )

AT 2023nf - 2023-01-28 (T+14.3d)
Image below (2023-01-28.864) was taken 14.3 days after discovery of 2023nf
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +15.30

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-01-28 20:51 UT (#1093085-88)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023nf - 2023-01-29 (T+15.3d)
Image below (2023-01-29.935) was taken 15.3 days after discovery of 2023nf
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +15.52

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-01-29 22:35 UT (#1094024-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023nf - 2023-02-12 (T+29.3d)
Image below (2023-02-12.854) was taken 29.3 days after discovery of 2023nf
Position of reported transient (faded ) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-12 20:35 UT (#1097056-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023nf - 2023-02-14 (T+30.4d)
Image below (2023-02-14.001) was taken 30.4 days after discovery of 2023nf
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-14 00:10 UT (#1098114-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated CCD Image (150% size, linear scale, cropped)
Image details as above

AT 2023qt - CV Type Transient (discovered 2023-01-14) - Attempt

AT 2023qt (Perseus)
AT 2023qt (Type: CV) discovered 2023-01-14.916 UT by Gaia
Alias: Gaia23ahb
Discovery Magnitude 16.80 (G-Gaia Filter) (vs Historic Mag 20.58 +/- 0.23 SD)
Outburst in candidate CV ASASSN-17oi
( TNS 2023qt | Gaia23ahb )

AT 2023qt - 2023-12-02 (T+321.1d)
Image below (2023-12-02.042) was taken 321.1 days after discovery of 2023qt
No indication of any object at reported position (shown by white cross-hairs)
Non-Detection, Limiting Mag +18.5 (Clear Filter)
CV has most-likely faded to normal magnitude of +20 to +21

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 01:03 UT (#1170210-13)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rt - CV Type Transient (discovered 2023-01-15)

AT 2023rt (Lynx)
AT 2023rt (Type: CV) discovered 2023-01-15.380 UT by ATLAS
Alias: ATLAS23art, ZTF23aaanxbm
Discovery Magnitude 15.87 (orange-ATLAS filter)
( TNS 2023rt )

AT 2023rt - 2024-01-07 (T+357.6d)
Image below (2024-01-07.987) was taken 357.6 days after discovery of 2023rt
Position of earlier transient (no longer visible) is shown by white cross-hairs
Limiting Magnitude 19.3 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-07 23:51 UT (#1180106-10)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT2023ru - CV Type Transient (Attempt)

AT 2023ru (Taurus)
AT 2023ru (Type: CV) discovered 2023-01-15.090 UT by ATLAS
Alias: ATLAS23aru, ZTF23aaamjwv, Gaia23alh
Discovery Magnitude 14.95 (orange-ATLAS Filter) (vs Prior Non-Detection Limiting Mag 19.5)
Hostless blue transient
Gaia, 2023-01-26 23:11, mag 16.78
Gaia, 2023-03-02 14:50, mag 19.23
( TNS 2023ru | Gaia23alh )

AT 2023ru - 2023-12-02 (T+321.0d)
Image below (2023-12-02.101) was taken 321.0 days after discovery of 2023ru
No indication of any object at reported position (shown by white cross-hairs)
Non-Detection, Limiting Mag +18.2 (Clear Filter)
CV has most-likely faded to normal magnitude of > +19.5

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 02:30 UT (#1170249-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023us - Transient (discovered 2023-01-16)

AT 2023us (Hydra)
AT 2023us (Type: unk) discovered 2023-01-16.937 UT by ATLAS
Alias: ATLAS23avl
Discovery Magnitude 16.47(cyan-ATLAS Filter)
vs Previous Non-Detection Limiting Flux +19.5
( TNS 2023us )

AT 2023us - 2024-02-20 (T+400.0d)
Image below (2024-02-20.929) was taken 400.0 days after discovery of 2023us
Position of reported transient (ambiguous object ?, likely faded) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-20 22:23 UT (#1187055-57)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023us - Detail 2024-02-20 (T+400.0d)
Position of reported transient (ambiguous object ?, likely faded) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
Image details as above

Images of AT 2023us on Transients 2023 Page >>

AT 2023vn - Type ulens? Transient (discovered 2023-01-16)

AT 2023vn (Cygnus)
AT 2023vn (Type: ulens?) discovered 2023-01-16.206 UT by Gaia
Alias: Gaia23ahn
Alerting Mag +14.15 (G-Gaia Filter) (vs Historic Magnitude +14.43)
( TNS 2023vn | Gaia23ahn )

AT 2023vn - 2023-09-03 (T+230.7d)
Image below (2023-09-03.951) was taken 230.7 days after discovery of 2023vn
Position of transient is shown by white cross-hairs
Measured magnitude +13.35

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-03 22:58 UT (#1138070-74)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vp - CV Type Transient (discovered 2023-01-16)

AT 2023vp (Perseus)
AT 2023vp (Type: CV) discovered 2023-01-16.677 UT by Gaia
Alias: Gaia23ahq
Discovery Magnitude 12.47 (G-Gaia Filter) (vs Historic magnitude 12.69)
~0.2 mag rise in Gaia source
( TNS 2023vp | Gaia23ahq)

AT 2023vp - 2023-01-27 (T+10.4d)
Image below (2023-01-27.053) was taken 10.4 days after discovery of 2023vp
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.75

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-01-27 01:20 UT (#1091059-63)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vp - 2023-01-28 (T+12.2d)
Image below (2023-01-28.888) was taken 12.2 days after discovery of 2023vp
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.63

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-01-28 21:22 UT (#1093109-13)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vp - 2023-02-12 (T+27.2d)
Image below (2023-02-12.917) was taken 27.2 days after discovery of 2023vp
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.72

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-02-12 22:03 UT (#1097087-90)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vp - 2023-02-22 (T+36.3d)
Image below (2023-02-22.001) was taken 36.3 days after discovery of 2023vp
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.67

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-02-22 00:05 UT (#1100102-06)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vp - 2023-02-23 (T+37.4d)
Image below (2023-02-23.046) was taken 37.4 days after discovery of 2023vp
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.71

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-02-23 01:09 UT (#1101148-52)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vp - 2023-03-08 (T+50.3d)
Image below (2023-03-08.010) was taken 50.3 days after discovery of 2023vp
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.62

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-08 00:16 UT (#1104043-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vp - 2023-03-27 (T+70.3d)
Image below (2023-03-27.938) was taken 70.3 days after discovery of 2023vp
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.68

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-27 22:34 UT (#1108069-72)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vp - 2023-04-03 (T+76.5d)
Image below (2023-04-03.129) was taken 76.5 days after discovery of 2023vp
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.76

Annotated CCD Image (100% size, linear scale, cropped)
60s exposure (single frame), 3x3 binning, Clear Filter
2023-04-03 03:06 UT (#1110175)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vp - 2023-04-21 (T+94.4d)
Image below (2023-04-21.088) was taken 94.4 days after discovery of 2023vp
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.70

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-04-21 02:09 UT (#1116118-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vq - Type YSO? Transient (discovered 2023-01-16)

AT 2023vq (Perseus)
AT 2023vq (Type: YSO?) discovered 2023-01-16.406 UT by Gaia
Alias: Gaia23ahr
Discovery Mag 11.87 (G-gaia filter) vs Historic magnitude 11.44)
~0.4 mag dip in candidate YSO
( TNS 2023vq | Gaia23ahr )

AT 2023vq - 2023-02-13 (T+28.5d)

Annotated CCD Image (50% size, linear scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-13 21:00 UT (#1098019-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vq - 2023-01-26 (T+10.5d)
Image below (2023-01-26.953) was taken 10.5 days after discovery of 2023vq
Position of reported transient (distinct) is shown by white cross-hairs
Measured mag +11.67

Annotated CCD Image (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-01-26 22:56 UT (#1091026-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vq - 2023-02-12 (T+27.5d)
Image below (2023-02-12.939) was taken 27.5 days after discovery of 2023vq
Position of reported transient (distinct) is shown by white cross-hairs
Measured mag +12.13

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-12 22:42 UT (#1097100-04)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vq - 2023-02-13 (T+28.5d)
Image below (2023-02-13.870) was taken 28.5 days after discovery of 2023vq
Position of reported transient (distinct) is shown by white cross-hairs
Measured mag +12.11

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-13 21:00 UT (#1098019-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ati - Transient (discovered 2023-01-23) - Attempt

AT 2023ati (Canis Minor)
AT 2023ati (Type: unk) discovered 2023-01-23.321 UT by ZTF
Alias: ZTF23aaajjji
Discovery Magnitude 15.26 (g-ZTF Filter)
vs Prior Non-Detection Limiting Magnitude 19.12
( TNS 2023ati )

AT 2023ati - 2024-02-25 (T+398.5d)
Image below (2024-02-25.867) was taken 398.5 days after discovery of 2023ati
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-25 20:56 UT (#1192057-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ayf - CV Type Transient (discovered 2023-01-26) - Attempt

AT 2023ayf (Camelopardalis)
AT 2023ayf (Type: CV) discovered 2023-01-26.640 UT by XOSS
Alias: XM119HT, TCP J04361641+5628241, Gaia23aor
Discovery Magnitude 15.13 (Clear Filter)
UG candidate classified by XOSS
Gaia detection of confirmed CV in 4.5 mag outburst (vs Historic Mag 20.01 +/- 0.25 SD)
Gaia, 2023-02-04 22:14, mag 15.45
Gaia, 2023-04-19 20:56, mag 20.02
( TNS 2023ayf | Gaia23aor )

AT 2023ayf - 2023-12-02 (T+309.5d)
Image below (2023-12-02.092) was taken 309.5 days after discovery of 2023ayf
No indication of any object at reported position (shown by white cross-hairs)
Non-Detection, Limiting Mag +17.7 (Clear Filter)
CV has most-likely faded to normal magnitude of +20.0

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 02:15 UT (#1170242-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023bji - Nova Type Transient (discovered 2023-02-05)

AT 2023bji (Camelopardalis)
AT 2023bji (Type: Nova) discovered 2023-02-05.008 UT by Gaia
Alias: Gaia23apb, ZTF23aabvpgb
Discovery Mag 18.28 (G-Gaia Filter) vs Previous Non-Detection Limiting Mag 21.5
Apparently hostless blue transient, rising fast
( TNS 2023bji | Gaia23apb )

AT 2023bji - 2024-01-06 (T+335.9d)
Image below (2024-01-06.901) was taken 335.9 days after discovery of 2023bji
Position of earlier transient (faded & no-longer visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-06 21:41 UT (#1179104-05)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023bml - Type MP Transient (discovered 2023-02-09), non-detection

AT 2023bml (Taurus)
AT 2023bml (Type: MP) discovered 2023-02-09.941 UT by MASTER
Alias: MASTER OT J054616.03+231441.0
Discovery Magnitude 16.0 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 19.12
( TNS 2023bml )

AT 2023bml - 2024-02-27 (T+383.0d)
Image below (2024-02-27.894) was taken 383.0 days after discovery of 2023bml
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-27 21:36 UT (#1194119-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023bso - CV Type Transient (discovered 2023-02-13)

AT 2023bso (Cassiopeia)
AT 2023bso (Type: CV) discovered 2023-02-13.498 UT by Gaia
Alias: Gaia23asd
Discovery Mag 14.01 (G-Gaia Filter) (vs Historic Mag 14.25)
~0.2 mag rise in Gaia and wise source
( TNS 2023bso | Gaia23asd )

AT 2023bso - 2023-09-18 (T+217.4d)
Image below (2023-09-18.886) was taken 217.4 days after discovery of 2023bso
Position of reported transient (likely faded back to nomal) is shown by white cross-hairs
Measured magnitude+13.62 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-09-18 21:19 UT (#1146037-41)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT2023clo - CV Type Transient, V0476 Cyg (discovered 2023-02-20)

AT 2023clo (Cygnus)
AT 2023clo (Type: CV) discovered 2023-02-20.690 UT by Gaia
Alias: Gaia23ava, V0476 Cyg
Discovery Magnitude 16.49 (g-Gaia Filter)
vs Historic Magnitude 17.78 +/- 0.35 SD
Outburst in known CV V0476 Cyg
( TNS 2023clo | Gaia23ava )

V0476 Cyg / AT 2023clo (T+372.5d)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-28 03:56 UT (#1194211-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023clo - 2024-02-28 (T+372.5d)
Image below (2024-02-28.162) was taken 372.5 days after discovery of 2023clo
Position of earlier transient (very faint) is shown by white cross-hairs
Measured Magnitude +16.70 (Clear Filter)

AT 2023cmu - CV Type Transient (discovered 2023-02-22)

AT 2023cmu (Virgo)
AT 2023cmu (Type: CV) discovered 2023-02-22.088 UT by Gaia
Alias: Gaia23avk
Discovery Mag 16.03 (G-Gaia Filter) vs Previous Non-Detection Limiting Mag 21.5
5 mag outburst in known CV
( TNS 2023cmu | Gaia23avk )

AT 2023cmu - 2024-01-07 (T+319.2d)
Image below (2024-01-07.272) was taken 319.2 days after discovery of 2023cmu
Position of earlier transient (faded & no-longer visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-07 06:34 UT (#1179254-57)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023csv - Type YSO? Transient (discovered 2023-03-02)

AT 2023csv (Orion)
AT 2023csv (Type: YSO?) discovered 2023-03-02.355 UT by Gaia
Alias: Gaia23aym
Discovery magnitude 15.02 (G-Gaia Filter)
vs Historic magnitude 16.27 +/- 0.39 SD
( Historic Range 15.3 to 18.9 )
( TNS 2023csv | Gaia23aym )

AT 2023csv (YSO ?)
Near HIP 26241 in Open Cluster NGC 1980
HIP 26241 (Iota Ori, mag +2.75)

Annotated CCD Image (50% size, linear scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 01:26 UT (#1172145-49)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023csv - 2023-12-06 (T+278.7d)
Image below (2023-12-06.053) was taken 278.7 days after discovery of 2023csv
Position of reported transient (faint) is shown by white circle
Measured Magnitude + 16.85 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 01:26 UT (#1172145-49)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctk - Type YSO Transient (discovered 2023-03-03)

AT 2023ctk (Orion)
AT 2023ctk (Type: YSO) discovered 2023-03-03.857 UT by Gaia
Alias: Gaia23azb, EM* LkHA 294
Discovery Mag 16.3 (G-Gaia Filter) vs Historic Mag 15.05
Dimming in known YSO (Young Stellar Object)
( TNS 2023ctk | Gaia23azb )

AT 2023ctk - 2023-10-02 (T+212.3d)
Image below (2023-10-02.175) was taken 212.3 days after discovery of 2023ctk
Position of earlier transient (distinct) is shown by white cross-hairs
Measured Magnitude +15.27 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-02 04:21 UT (#1152081-85)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctk - 2024-01-13 (T+316.1d)
Image below (2024-01-13.908) was taken 316.1 days after discovery of 2023ctk
Position of earlier transient (distinct, dimming ?) is shown by white cross-hairs
Measured Magnitude +15.55 (Clear Filter)
Poor quality image (slight star trailing, single frame)

Annotated CCD Image (100% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-01-13 21:47 UT (#1182026)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023crg - CV Type Transient (discovered 2023-02-28) non-detection

AT 2023crg (Ophiuchus)
AT 2023crg (Type: CV) discovered 2023-02-28.982 UT by MASTER
Alias: MASTER OT J171402.01-185959.3
Discovery Magnitude 16.3 (Clear Filter)
vs Prior Non-Detection Limiting Magnitude 18.5
( TNS 2023crg )

AT 2023crg - 2024-04-14 (T+410.1d)
Image below (2024-04-14.126) was taken 410.1 days after discovery of 2023crg
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-14 03:04 UT (#1208103-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cts - Type YSO? Transient (discovered 2023-03-04)

AT 2023cts (Orion)
AT 2023cts (Type: YSO?) discovered 2023-03-04.858 UT by Gaia
Alias: Gaia23azh
Discovery Magnitude 13.19 (G-Gaia Filter) (vs Historic magnitude 14.58 +/- 0.42 SD)
Brightening in candidate YSO
( TNS 2023cts | Gaia23azh)

AT 2023cts (T+4.0d)

Annotated CCD Image (50% size, linear scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-08 21:08 UT (#1105018-20)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cts (T+4.0d)
Image below (2023-03-08.877) was taken 4.0 days after discovery of 2023cts
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +13.14 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-08 21:08 UT (#1105018-20)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cts - 2023-03-14 (T+10.0d)
Image below (2023-03-14.837) was taken 10.0 days after discovery of 2023cts
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +13.93 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-14 20:08 UT (#1107013-14)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cts - 2023-11-09 (T+249.2d)
Image below (2023-11-09.027) was taken 249.2 days after discovery of 2023cts
Position of reported transient (faded back to historic level) is shown by white cross-hairs
Measured magnitude +14.58 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 00:47 UT (#1163170-74)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cts - 2023-12-03 (T+273.2d)
Image below (2023-12-03.028) was taken 273.2 days after discovery of 2023cts
Position of reported transient (faded back to historic level) is shown by white cross-hairs
Measured magnitude +15.05 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 120s exposure (average combine), 3x3 binning, Clear Filter
2023-12-03 00:47 UT (#1171185-89)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cts - 2024-02-22 (T+355.1d)
Image below (2024-02-22.935) was taken 355.1 days after discovery of 2023cts
Position of reported transient (at around historic level) is shown by white cross-hairs
Measured magnitude +14.64 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 120s exposure (average combine), 3x3 binning, Clear Filter
2024-02-22 22:31 UT (#1189091-94)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cts - 2024-02-23 (T+356.0d)
Image below (2024-02-23.842) was taken 356.0 days after discovery of 2023cts
Position of reported transient (brightened slightlyl) is shown by white cross-hairs
Measured magnitude +14.02 (Clear Filter)
Poor quality image (poor sky condition / single frame)

Annotated CCD Image (100% size, linear scale, cropped)
120s exposure (single frame), 3x3 binning, Clear Filter
2024-02-23 20:13 UT (#1190029)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctt - CV Type Transient (discovered 2023-03-04)

AT 2023ctt (Triangulum)
AT 2023ctt (Type: CV) discovered 2023-03-04.895 UT by Gaia
Alias: Gaia23azi
Discovery Mag 15.78 (Clear filter) vs Historic Magnitude 18.86
4 mag outburst in candidate CV
( TNS 2023ctt | Gaia23azi)

AT 2023ctt (T+6.0d)

Annotated CCD Image (50% size, linear scale)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-10 21:39 UT (#1106098-101)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctt - 2023-03-10 (T+6.0d)
Image below (2023-03-10.900) was taken 6.0 days after discovery of 2023ctt
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +18.42

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-10 21:39 UT (#1106098-101)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctt - 2023-03-27 (T+23.0d)
Image below (2023-03-27.883) was taken 23.0 days after discovery of 2023ctt
Position of earlier transient (faded/no longer visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-27 21:14 UT (#1108043-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctx - CV Type Transient (discovered 2023-03-05)

AT 2023ctx (Aquila)
AT 2023ctx (Type: CV) discovered 2023-03-05.538 UT by Gaia
Alias: Gaia23azk
Discovery Mag 13.85 (g-GAIA Filter). No historic magnitude.
Apparently hostless red transient
( TNS 2023ctx | Gaia23azk)

AT 2023ctx - 2023-03-15 (T+9.6d)
Image below (2023-03-15.151) was taken 9.6 days after discovery of 2023ctx
Position of reported CV Transient (distinct) is shown by white cross-hairs
Measured magnitude +16.07

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-15 03:47 UT (#1107179-83)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctx - Ref Image (PanSTARRS Image)
Position of reported CV Transient is shown by mauve cross-hairs
No host object is visible at the reported position

Ref Image prepared for same FOV & scale

AT 2023ctx - 2023-03-28 (T+22.6d)
Image below (2023-03-28.126) was taken 22.6 days after discovery of 2023ctx
Position of reported CV Transient (fading) is shown by white cross-hairs
Measured magnitude +16.99

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-28 03:10 UT (#1108176-80)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctx - 2023-04-20 (T+45.5d)
Image below (2023-04-20.039) was taken 45.5 days after discovery of 2023ctx
Position of reported CV Transient (very faint) is shown by white cross-hairs
Measured magnitude +18.09

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-20 01:04 UT (#1115075-79)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctz - CV Type Transient (discovered 2023-03-05) (attempted observation)

AT 2023ctz (Sagitta)
AT 2023ctz (Type: CV) discovered 2023-03-05.702 UT by Gaia
Alias: Gaia23azp
Discovery Magnitude 15.33 (G-Gaia Filter)
vs Historic Magnitude 20.53
( TNS 2023ctz | Gaia23azp )

AT 2023ctz - 2023-08-30 (T+178.3d)
Image below (2023-08-30.995) was taken 178.3 days after discovery of 2023ctz
Position of reported transient (not visible, faded ?) is shown by whiIte cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-08-30 23:55 UT (#1135077-80)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ctz - 2023-11-09 (T+249.1d)
Image below (2023-11-09.848) was taken 249.1 days after discovery of 2023ctz
Position of reported transient (not visible, likely faded back to historic level) is shown by whiIte cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 20:24 UT (#1164056-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023ctz on Transients 2023 Page >>

AT 2023cub - Transient (discovered 2023-03-06)

AT 2023cub (Monoceros)
AT 2023cub (Type: CV) discovered 2023-03-06.851 UT by Gaia
Alias: Gaia23azr
Alerting Magnitude 11.63 (G-Gaia Filter)
vs Historic magnitude 12.42 +/- 0.21 SD
Slow brightening in Gaia / X-ray source. Class unknown.
( TNS 2023cub | Gaia23azr)

AT 2023cub starfield (T+8.0d)

Annotated CCD Image (50% size, linear scale)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-14 21:24 UT (#1107033-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cub - 2023-03-14 (T+8.0d)
Image below (2023-03-14.890) was taken 8.0 days after discovery of 2023cub
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +11.69

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-14 21:24 UT (#1107033-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cub - 2023-10-05 (T+212.3d)
Image below (2023-10-05.119) was taken 212.3 days after discovery of 2023cub
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +11.82

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-05 02:54 UT (#1154192-95)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cub - 2023-10-12 (T+219.3d)
Image below (2023-10-12.190) was taken 219.3 days after discovery of 2023cub
Position of reported transient (faded slightly) is shown by white cross-hairs
Measured magnitude +12.02

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-12 04:36 UT (#1156210-14)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cub - 2023-10-17 (T+224.4d)
Image below (2023-10-17.213) was taken 224.4 days after discovery of 2023cub
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +11.83

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-17 05:09 UT (#1157044-48)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cub - 2023-12-19 (T+287.2d)
Image below (2023-12-19.092) was taken 287.2 days after discovery of 2023cub
Position of reported transient (brightening) is shown by white cross-hairs
Measured magnitude +11.03

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 02:15 UT (#1175115-19)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cub - 2024-02-20 (T+351.0d)
Image below (2024-02-20.888) was taken 351.0 days after discovery of 2023cub
Position of reported transient (fading) is shown by white cross-hairs
Measured magnitude +11.87

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-20 21:22 UT (#1187030-34)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cub - 2024-02-27 (T+358.1d)
Image below (2024-02-27.924) was taken 358.1 days after discovery of 2023cub
Position of reported transient (brightening slightly ?) is shown by white cross-hairs
Measured magnitude +11.78 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-27 22:14 UT (#1194133-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cuo - Type ulens? Transient (discovered 2023-03-07)

AT 2023cuo (Scutum)
AT 2023cuo (Type: ulens?) discovered 2023-03-07.226 UT by Gaia
Alias: Gaia23baf
Alerting Magnitude 10.14 (g-GAIA Filter) vs Historic Magnitude 10.45 +/- 0.06)
Bright blue gal.plane source candidate microlensing event
or Be-type outburst rises by 0.3 mag
( TNS 2023cuo | Gaia23baf)

AT 2023cuo (T+20.9d)

Annotated CCD Image (50% size, linear scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-28 04:12 UT (#1108216-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cuo - 2023-03-28 (T+20.9d)
Image below (2023-03-28.171) was taken 20.9 days after discovery of 2023cuo
Position of reported CV Transient (distinct) is shown by white cross-hairs
Measured magnitude +11.20

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-28 04:12 UT (#1108216-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cuo - 2023-04-20 (T+43.9d)
Image below (2023-04-20.108) was taken 43.9 days after discovery of 2023cuo
Position of reported CV Transient (distinct) is shown by white cross-hairs
Measured magnitude +11.19

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-20 02:44 UT (#1115151-55)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cuo - 2023-04-21 (T+44.9d)
Image below (2023-04-21.114) was taken 44.9 days after discovery of 2023cuo
Position of reported CV Transient (distinct) is shown by white cross-hairs
Measured magnitude +10.77

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-21 02:50 UT (#1116147-50)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cuo - 2023-07-15 (T+130.8d)
Image below (2023-07-15.991) was taken 130.8 days after discovery of 2023cuo
Position of reported CV Transient (distinct) is shown by white cross-hairs
Measured magnitude +11.75

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-07-15 23:54 UT (#1122020-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cuy - CV Type Transient (discovered 2023-03-07)

AT 2023cuy (Perseus)
AT 2023cuy (Type: CV) discovered 2023-03-07.642 UT by Gaia
Alias: Gaia23baq, ASASSN-19ba
Discovery magnitude 16.02 (G-Gaia filter) vs Historic magnitude 17.87 +/- 0.42 SD
Outburst in candidate CV ASASSN-19ba
( TNS 2023cuy | Gaia23baq )

AT 2023cuy - 2023-09-25 (T+202.4d)
Image below (2023-09-25.994) was taken 202.4 days after discovery of 2023cuy
Position of earlier reported transient (faint) is shown by white cross-hairs
Measured Magnitude +18.26 (Clear Filter)
Transient appears to have returned to its historic range / dim state

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-09-25 23:55 UT (#1149085-89)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cuy - 2023-11-12 (T+249.4d)
Image below (2023-11-12.038) was taken 249.4 days after discovery of 2023cuy
Position of earlier reported transient (faint) is shown by white cross-hairs
Measured Magnitude +17.48 (Clear Filter)
Transient appears to have returned to its historic range / dim state

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-12 00:57 UT (#1165144-48)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023cuy on Transients 2023 Page >>

AT 2023cuz - Type YSO Transient, UY Aur (discovered 2023-03-07)

AT 2023cuz / UY Aur (Auriga)
AT 2023cuz (Type: YSO) discovered 2023-03-07.629 UT by Gaia
Alias: Gaia23bar, UY Aur
Discovery Magnitude 13.48 (G-Gaia Filter) (vs Historic magnitude 11.80 +/- 0.21 SD)
Known YSO UY Aur fades by ~1.5 mag
( TNS 2023cuz | Gaia23bar)

Star field with UY Aur

Annotated CCD Image (50% size, linear scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 02:23 UT (#1163210-12)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cuz / UY Aur - 2023-11-09 (T+246.5d)
Image below (2023-11-09.096) was taken 246.5 days after discovery of 2023cuz
Position of reported transient, UY Aur (returning towards historic level ?) is shown by white cross-hairs
Measured magnitude +12.81 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 02:23 UT (#1163210-12)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cuz - 2024-02-27 (T+357.3d)
Image below (2024-02-27.933) was taken 357.3 days after discovery of 2023cuz
Position of reported transient, UY Aur (returning towards historic level ?) is shown by white cross-hairs
Measured magnitude +12.60 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-27 22:30 UT (#1194140-43)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cvz - CV Type Transient (discovered 2023-03-07)

AT 2023cvz (Aquila)
AT 2023cvz (Type: CV) discovered 2023-03-07.959 UT by Gaia
Alias: Gaia23bay
Alerting Magnitude 12.85 (g-GAIA Filter) vs Historic Magnitude 13.79)
~0.9 mag rise in Gaia source
( TNS 2023cvz | Gaia23bay)

AT 2023cvz (T+7.2d)

Annotated CCD Image (50% size, linear scale)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-15 04:03 UT (#1107186-90)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cvz - 2023-03-15 (T+7.2d)
Image below (2023-03-15.167) was taken 7.2 days after discovery of 2023cvz
Position of reported CV Transient (distinct) is shown by white cross-hairs
Measured magnitude +12.58

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-15 04:03 UT (#1107186-90)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cvz - 2023-03-28 (T+20.2d)
Image below (2023-03-28.140) was taken 20.2 days after discovery of 2023cvz
Position of reported CV Transient (distinct) is shown by white cross-hairs
Measured magnitude +12.06

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-28 03:24 UT (#1108184-88)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cvz - 2023-04-19 (T+42.2d)
Image below (2023-04-19.122) was taken 42.2 days after discovery of 2023cvz
Position of reported CV Transient (fading) is shown by white cross-hairs
Measured magnitude +12.74

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-04-19 02:59 UT (#1114149-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cvz - 2023-04-20 (T+43.1d)
Image below (2023-04-20.094) was taken 43.1 days after discovery of 2023cvz
Position of reported CV Transient (fading) is shown by white cross-hairs
Measured magnitude +12.93

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-04-20 02:18 UT (#1115127-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cvz - 2023-04-26 (T+49.1d)
Image below (2023-04-26.061) was taken 49.1 days after discovery of 2023cvz
Position of reported CV Transient (fading) is shown by white cross-hairs
Measured magnitude +13.12

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-04-26 01:31 UT (#1118077-81)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cvz - 2023-07-16 (T+130.1d)
Image below (2023-07-16.017) was taken 130.1 days after discovery of 2023cvz
Position of reported CV Transient (fading) is shown by white cross-hairs
Measured magnitude +13.75

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-07-16 00:28 UT (#1122033-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cvz - 2023-08-05 (T+151.0d)
Image below (2023-08-05.997) was taken 151.0 days after discovery of 2023cvz
Position of reported CV Transient (fading) is shown by white cross-hairs
Measured magnitude +13.77

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-08-05 23:56 UT (#1125017-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cwd - CV Type Transient

AT 2023cwd (Puppis)
AT 2023cwd (Type: CV) discovered 2023-03-08.084 UT by Gaia
Alias: Gaia23bbc
Discovery Magnitude 15.51 (G-Gaia Filter)
(vs Historic magnitude 18.23 +/- 0.18 SD)
~3 mag outburst in red Gaia source with faint GALEX detection
( TNS 2023cwd | Gaia23bbc)

AT 2023cwd - 2024-02-27 (T+356.8d)
Image below (2024-02-27.871) was taken 356.8 days after discovery of 2023cwd
Position of reported transient (barely visible ?) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-27 20:56 UT (#1194107-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cxz - CV Type Transient (discovered 2023-03-12) - non-detection

AT 2023cxz (Camelopardalis)
AT 2023cxz (Type: CV) discovered 2023-03-12.285 UT by ATLAS
Alias: ATLAS23dmk, Gaia23boy
Discovery Magnitude 14.87 (orange-ATLAS Filter)
vs Prior Non-Detection Limiting Magnitude 19.45
Gaia, 2023-03-14 23:14, mag 16.13
Gaia, 2023-04-16 09:02, mag 18.26
( TNS 2023cxz | Gaia23boy )

AT 2023cxz - 2024-02-25 (T+350.7d)
Image below (2024-02-25.989) was taken 350.7 days after discovery of 2023cxz
Position of reported transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-25 23:45 UT (#1192106-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023dnz - Type ulens? Transient (discovered 2023-03-11)

AT 2023dnz (Cassiopeia)
AT 2023dnz (Type: ulens?) discovered 2023-03-11.909 UT by Gaia
Alias: Gaia23bcr
Discovery Mag 13.21 (G-Gaia Filter) vs Historic Mag 13.44
Bright gal.plane source candidate microlensing event or Be-type outburst rises by 0.2 mag
( TNS 2023sqw | Gaia23bcr )

AT 2023dnz (T+193.0d)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-20 22:43 UT (#1147078-82)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023dnz - 2023-09-05 (T+177.1d)
Image below (2023-09-05.058) was taken 177.1 days after discovery of 2023dnz
Position of reported transient (likely faded again) is shown by white cross-hairs
Note: Unable to separate AT 2023dnz and adjacent star

Annotated CCD Image (175% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-05 01:32 UT (#1139124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023dnz - 2023-09-20 (T+193.0d)
Image below (2023-09-20.942) was taken 193.0 days after discovery of 2023dnz
Note: Unable to separate AT 2023dnz and adjacent star

Annotated CCD Image (175% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-20 22:43 UT (#1147078-82)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023dwm - CV Type Transient (discovered 2023-03-24)

AT 2023dwm (Cygnus)
AT 2023dwm (Type: CV) discovered 2023-03-24.595 UT by MASTER
Alias: MASTER OT J203050.57+554708.9
Discovery Magnitude 12.6 (Clear Filter)
( TNS 2023dwm )

AT 2023dwm (T+3.4d)
Position of reported transient (bright) is shown by white cross-hairs

Annotated CCD Image (50% size, linear scale)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-27 23:31 UT (#1108089-93)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023dwm - 2023-03-27 (T+3.4d)
Image below (2023-03-27.978) was taken 3.4 days after discovery of 2023dwm
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.63

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-03-27 23:31 UT (#1108089-93)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023dwm - 2023-04-02 (T+9.4d)
Image below (2023-04-02.993) was taken 9.4 days after discovery of 2023dwm
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.66

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-04-02 23:53 UT (#1110102-06)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023dwm - 2023-04-19 (T+25.5d)
Image below (2023-04-19.097) was taken 25.5 days after discovery of 2023dwm
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.79

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-04-19 02:24 UT (#1114126-30)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023dwm - 2023-05-12 (T+49.4d)
Image below (2023-05-12.959) was taken 49.4 days after discovery of 2023dwm
Position of reported transient (fading slowly) is shown by white cross-hairs
Measured magnitude +13.08

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-05-12 23:04 UT (#1119019-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023dwm - 2023-07-22 (T+120.4d)
Image below (2023-07-22.969) was taken 120.4 days after discovery of 2023dwm
Position of reported transient (fading) is shown by white cross-hairs
Measured magnitude +14.40

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-07-22 23:17 UT (#1123009-11)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023efy - CV Type Transient (discovered 2023-03-24)

AT 2023efy (Cygnus)
AT 2023efy (Type: CV) discovered 2023-03-24.198 UT by Gaia
Alias: Gaia23bgf
Discovery Magnitude 16.80 (G-Gaia Filter)
vs Historic Magnitude 17.03 +/- 0.06 SD
~0.25 mag rise in Gaia source
( TNS 2023efy | Gaia23bgf )

AT 2023efy - 2023-11-09 (T+230.7d)
Image below (2023-11-09.903) was taken 230.7 days after discovery of 2023efy
Position of reported transient (very faint, close to another star) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 21:43 UT (#1164083-87)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023efy - Detail, 2023-11-09 (T+230.7d)

Annotated CCD Image (150% size, square root scale, cropped)
Image details as above

AT 2023eid - CV Type Transient (discovered 2023-03-28)

AT 2023eid (Puppis)
AT 2023eid (Type: CV) discovered 2023-03-28.086 UT by Gaia
Alias: Gaia23bhl
Discovery Magnitude 13.53 (G-Gaia Filter)
vs Historic magnitude 13.83 +/- 0.09 SD
Brightening in Gaia/WISE source
( TNS 2023eid | Gaia23bhl)

AT 2023eid - 2024-02-22 (T+331.8d)
Image below (2024-02-22.867) was taken 331.8 days after discovery of 2023eid
Position of reported transient (relatively faint) is shown by white cross-hairs
Measured magnitude +13.33 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-22 20:50 UT (#1189041-43)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023eid - 2024-02-23 (T+332.8d)
Image below (2024-02-23.915) was taken 332.8 days after discovery of 2023eid
Position of reported transient (relatively faint) is shown by white cross-hairs
Measured magnitude +13.31 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 22:00 UT (#1190085-88)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023elx - CV Type Transient (discovered 2023-03-30) in Open Cluster NGC 2345

AT 2023elx (Canis Major)
AT 2023elx (Type: CV) discovered 2023-03-30.837 UT by Gaia
Alias: Gaia23bir
Discovery Magnitude 13.26 (G-Gaia Filter)
vs Historic Mag 13.65 +/- 0.08 SD
~0.3 mag rise in Be star
Gaia, 2022-03-15 19:07, mag 13.65
Gaia, 2022-10-07 22:28, mag 13.56
Gaia, 2022-11-07 04:11, mag 13.32
Gaia, 2023-03-04 20:14, mag 13.26
Gaia, 2023-11-18 05:22, mag 13.28
( TNS 2023elx | Gaia23bir )

Open Cluster NGC 2345 with AT 2023elx (T+246.3d)

Annotated CCD Image (50% size, linear scale)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 03:27 UT (#1170274-78)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023elx - 2023-12-02 (T+246.3d)
Image below (2023-12-02.142) was taken 246.3 days after discovery of 2023elx
Position of reported transient (distinct) is shown by white cross-hairs
Measured Mag +13.39 (Clear Filter)
Continue to monitor

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 03:27 UT (#1170274-78)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023elx - 2024-02-16 (T+323.0d)
Image below (2024-02-16.837) was taken 323.0 days after discovery of 2023elx
Position of reported transient (distinct) is shown by white cross-hairs
Measured Mag +13.43 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-16 20:08 UT (#1186043-47)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023exh - Transient (discovered 2023-04-02)

AT 2023exh (Cygnus)
AT 2023exh (Type: unk) discovered 2023-04-02.466 UT by ZTF
Alias: ZTF23aaefkam
Discovery Magnitude 16.44 (r-ZTF Filter)
Prior Non-Detection, Non existent in SDSS/PS1
( TNS 2023exh )

AT 2023eid - 2024-02-22 (T+331.8d)
Image below (2024-02-22.867) was taken 331.8 days after discovery of 2023eid
Position of reported transient (not visible) is shown by white cross-hairs

Images of AT 2023exh on Transients 2023 Page >>

AT 2023gde - Nova Type Transient (discovered 2023-04-10)

AT 2023gde (Aquila)
AT 2023gde (Type: Nova) discovered 2023-04-10.430 UT by PGIR
Alias: PGIR23gjp
Discovery Mag 12.55 (J-Bessel Filter)
( Rochester Supernova site | TNS 2023gde )

AT 2023gde - 2023-04-26 (T+15.6d)
Image below (2023-04-26.044) was taken 15.6 days after discovery of 2023gde
Position of reported transient (faded since discovery) is shown by white cross-hairs
Measured Magnitude +12.56 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-26 01:09 UT (#1118070-72)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023gde - 2023-07-16 (T+96.6d)
Image below (2023-07-16.004) was taken 96.6 days after discovery of 2023gde
Position of reported transient (no longer visible) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-07-16 00:15 UT (#1122026-30)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023gqc - Type ulens? Transient (discovered 2023-04-17)

AT 2023gqc (Auriga)
AT 2023gqc (Type: ulens?) discovered 2023-04-17.432 UT by Gaia
Alias: Gaia23bpn
Discovery magnitude 11.40 (G-Gaia Filter)
vs Historic magnitude 11.70 +/- 0.06 SD
( TNS 2023gqc | Gaia23bpn )

AT 2023gqc - 2023-12-06 (T+232.6d)
Image below (2023-12-06.039) was taken 232.6 days after discovery of 2023gqc
Position of reported transient (bright) is shown by white cross-hairs
Measured Magnitude + 11.82 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 01:02 UT (#1172138-41)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023gqc - 2024-02-13 (T+301.8d)
Image below (2024-02-13.200) was taken 301.8 days after discovery of 2023gqc
Position of reported transient (bright) is shown by white cross-hairs
Measured Magnitude + 11.54 (Clear Filter)
Poor quality image (bad seeing)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-13 04:51 UT (#1184175-76)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023gqc - 2024-02-13 (T+302.5d)
Image below (2024-02-13.954) was taken 302.5 days after discovery of 2023gqc
Position of reported transient (bright) is shown by white cross-hairs
Measured Magnitude + 11.80 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-13 23:02 UT (#1185118-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023htu - Type ulens? Transient (discovered 2023-04-29)

AT 2023htu (Cassiopeia)
AT 2023htu (Type: ulens?) discovered 2023-04-29.208 UT by Gaia
Alias: Gaia23bst
Alerting Mag +16.92 (G-Gaia Filter) (vs Historic Magnitude +17.65)
Brightening in Gaia, WISE and UV source
( TNS 2023htu | Gaia23bst )

AT 2023htu - 2023-09-09 (T+132.9d)
Image below (2023-09-09.113) was taken 132.9 days after discovery of 2023htu
Position of transient is shown by white cross-hairs
Measured magnitude +14.85 (Clear Filter)
Single frame

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-09-09 02:43 UT (#1141179)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023htu - 2023-09-17 (T+140.9d)
Image below (2023-09-17.088) was taken 140.9 days after discovery of 2023htu
Position of transient is shown by white cross-hairs
Measured magnitude +14.84 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-17 02:16 UT (#1145127-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023htu - 2023-09-25 (T+149.7d)
Image below (2023-09-25.908) was taken 149.7 days after discovery of 2023htu
Position of transient is shown by white cross-hairs
Measured magnitude +14.82 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-25 21:56 UT (#1149043-47)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023hsf - Transient (discovered 2023-05-08) (Attempt)

AT 2023hsf (Draco)
AT 2023hsf (Type: unk) discovered 2023-05-08.430 UT by ZTF
Alias: ZTF23aaixebv
Discovery Mag +16.34 (g-ZTF Filter)
( TNS 2023hsf )

AT 2023hsf - 2023-09-04 (T+118.6d)
Image below (2023-09-04.033) was taken 118.6 days after discovery of 2023hsf
Position of earlier reported transient (faded / not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-04 00:56 UT (#1138124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023huk - Transient (discovered 2023-05-08) (Attempt)

AT 2023huk (Hercules)
AT 2023huk (Type: unk) discovered 2023-05-08.278 UT by ATLAS
Alias: ATLAS17fes
Discovery magnitude 16.11 (orange-ATLAS)
vs Prior Non-Detection Limiting Magnitude 18.23
( TNS 2023huk )

AT 2023huk - 2024-04-13 (T+340.8d)
Image below (2024-04-13.046) was taken 340.8 days after discovery of 2023huk
Position of earlier transient (not visible) is shown by white cross-hairs
Non-Detection, Limiting Magntitude +19.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-04-13 01:15 UT (#1207052-56)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023hxd - CV Type Transient (discovered 2023-05-11)

AT 2023hxd (Aquila)
AT 2023hxd (Type: CV) discovered 2023-05-11.245 UT by MASTER
Alias: MASTER OT J190920.77+004831.4
Discovery magnitude 13.4 (Clear filter)
( TNS 2023hxd)

AT 2023hxd (T+65.8d)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-07-16 01:15 UT (#1122056-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023hxd - 2023-07-16 (T+65.8d)
Image below (2023-07-16.051) was taken 65.8 days after discovery of 2023hxd
Position of earlier reported transient (distinct) is shown by white cross-hairs
Measured magntitude +14.97 (Clear Filter)

AT 2023hxd - Reference Image (DSS2 Color)
Position of Transient show by mauve crosshairs

AT 2023ima - Type ulens? Transient (discovered 2023-05-01)

AT 2023ima (Vulpecula)
AT 2023ima (Type: ulens?) discovered 2023-05-01.938 UT by Gaia
Alias: Gaia23bto
Alerting magnitude 15.38 (G-Gaia Filter) vs Historic magnitude 15.65
Bright near gal.plane source candidate microlensing event
or Be-type outburst rises by 0.3 mag
( TNS 2023ima | Gaia23bto )

AT 2023ima - 2023-10-22 (T+174.0d)
Image below (2023-10-22.944) was taken 174.0 days after discovery of 2023ima
Position of earlier reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +15.11 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 22:49 UT (#1158121-25)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023ima on Transients 2023 Page >>

AT 2023ipb - Transient (discovered 2023-05-13) - attempted observation

AT 2023ipb (Coma Berenices)
AT 2023ipb (Type: unk) discovered 2023-05-13.253 UT by ZTF
Alias: ZTF23aajikep
Discovery Magnitude 16.21 (g-ZTF Filter)
( TNS 2023ipb )

AT 2023ipb - 2023-12-03 (T+204.0d)
Image below (2023-12-03.258) was taken 204.0 days after discovery of 2023ipb
Position of earlier reported transient (no longer visible) is shown by white circle

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-12-03 06:11 UT (#1171244)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT2023jbs - Transient, PT And (discovered 2023-05-19)

AT 2023jbs (Andromeda)
AT 2023jbs (Type: unk) discovered 2023-05-19.477 UT by ZTF
Alias: ZTF23aaknvmk
Discovery magnitude 16.77 (r-ZTF Filter)
Prior Non-Detection Limiting Mag 19.5 (r-ZTF Filter) (2023-05-18 )
Based on a comparison of coordinates the Transient object
appears to have been an outburst of the CV star GCVS PT And
( TNS 2023jbs )

AT 2023jbs (PT And) (T+180.5d)
Position of earlier transient (faded & no longer visible) is shown by white cross-hairs
M31 Galaxy is towards lower left of image

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 22:49 UT (#1167195-99)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023jbs - 2023-11-15 (T+180.5d)
Image below (2023-11-15.945) was taken 180.5 days after discovery of 2023jbs
Position of earlier transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +18.5 (Clear Filter)

AT 2023otv - Transient (discovered 2023-08-04)

AT 2023otv (Cassiopeia)
AT 2023otv (Type: unk) discovered 2023-08-04.369 UT by ZTF
Alias: ZTF23aavxpit, Gaia23cek
Discovery Magnitude 15.67 (g-ZTF Filter)
vs Prior Non-Detection Limiting Mag 20.02
Gaia, Apparently hostless transient
Gaia, 2023-08-31 09:19, mag 17.83
( TNS 2023otv | Gaia23cek )

AT 2023otv - 2023-09-09 (T+35.7d)
Image below (2023-09-09.071) was taken 35.7 days after discovery of 2023otv
Position of earlier transient (very faint) is shown by white cross-hairs
Estimated magnitude 18.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-09 01:50 UT (#1141158-62)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023otv - 2023-11-06 (T+94.6d)
Image below (2023-11-06.949) was taken 94.6 days after discovery of 2023otv
Position of earlier transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.2 (Clear Filter)
Transient most-likely faded to normal magnitude of > +20.0

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-06 22:56 UT (#1161042-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023otv - 2023-12-02 (T+119.6d)
Image below (2023-12-02.006) was taken 119.6 days after discovery of 2023otv
No indication of any object at reported position (shown by white cross-hairs)
Non-Detection, Limiting Mag +18.5 (Clear Filter)
Transient most-likely faded to normal magnitude of > +20.0

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 00:15 UT (#1170183-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023pfd - Transient (discovered 2023-08-13)

AT 2023pfd (Cassiopeia)
AT 2023pfd (Type: unk) discovered 2023-08-13.260 UT by GEOTS
Alias: GEOTS-Balaji-2023-013, TCP J23534441+5145320, ZTF23aawzkue, ATLAS23rav
Discovery Mag +16.0 (Clear Filter) vs Last Non-Detection (limiting mag 18)
( TNS 2023pfd )

AT 2023pfd - 2023-09-26 (T+43.8d)
Image below (2023-09-26.081) was taken 43.8 days after discovery of 2023pfd
Position of transient (no longer visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-26 02:06 UT (#1149127-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023pmt - CV Type Transient (discovered 2023-08-15)

AT 2023pmt (Draco)
AT 2023pmt (Type: CV) discovered 2023-08-15.760 UT by XOSS
Alias: XM103MZ, TCP J20091347+6441100
Discovery Mag 16.7 (Clear Filter)
( TNS 2023pmt )

AT 2023pmt - 2023-09-21 (T+36.3d)
Image below (2023-09-21.018) was taken 36.3 days after discovery of 2023pmt
Position of reported transient (not visible / presumed faded) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-09-21 00:29 UT (#1147113-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023qou - CV Type Transient (discovered 2023-08-20) (attempted observation)

AT 2023qou (Cygnus)
AT 2023qou (Type: CV) discovered 2023-08-20.117 UT by XOSS
Alias: KATS23Q001, Gaia23cao
Discovery Mag 15.6 (Clear Filter)
vs Prior Non-Detection limiting mag 18.0
UG candidate classified by XOSS
Source not visible on PanSTARRS or DSS2 plate images in Aladin
Gaia, 2023-08-20 02:48 15.11
KATS23Q001 2023 08 23.82 16.2CV
( TNS 2023qou | Gaia23cao )

AT 2023qou - 2023-12-16 (T+118.7d)
Image below (2023-12-16.832) was taken 118.7 days after discovery of 2023qou
Position of earlier transient (not visible) is shown by white cross-hairs
Non-Detection, limiting mag +17.7 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-16 20:00 UT (#1173069-71)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023qun - Transient (discovered 2023-08-25)

AT 2023qun (Aries)
AT 2023qun (Type: unk) discovered 2023-08-25.908 UT by XOSS
Alias: KATS23Q003, ZTF23aazxoku, TCP J03223854+2130375
Discovery Mag 16.7 (Clear Filter)
( TNS 2023qun )

AT 2023qun - 2023-12-05 (T+102.0d)
Image below (2023-12-05.865) was taken 102.0 days after discovery of 2023qun
Position of earlier transient (faded & no longer visible) is shown by white cross-hairs
Non Detection, limiting magnitude+19.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-05 20:54 UT (#1172041-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023qun - 2024-01-06 (T+134.0d)
Image below (2024-01-06.879) was taken 134.0 days after discovery of 2023qun
Position of earlier transient (faded & no longer visible) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-06 21:12 UT (#1179094-96)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rao - Transient (discovered 2023-08-16)

AT 2023rao (Pegasus)
AT 2023rao (Type: unk) discovered 2023-08-16.381 UT by Gaia
Alias: Gaia23bxu
Alerting Mag +16.92 (G-Gaia Filter) (vs Historic Magnitude +17.65)
Brightening in Gaia, WISE and UV source
( TNS 2023rao | Gaia23bxu )

AT 2023rao - 2023-09-03 (T+18.6d)
Image below (2023-09-03.979) was taken 18.6 days after discovery of 2023rao
Position of transient is shown by white cross-hairs
Measured magnitude +16.32 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-03 23:39 UT (#1138094-98)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rao - 2023-09-12 (T+27.6d)
Image below (2023-09-12.951) was taken 27.6 days after discovery of 2023rao
Position of transient is shown by white cross-hairs
Measured magnitude +16.25 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-12 22:57 UT (#1143073-77)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rao - 2023-09-17 (T+31.7d)
Image below (2023-09-17.057) was taken 31.7 days after discovery of 2023rao
Position of transient is shown by white cross-hairs
Measured magnitude +16.30 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-17 01:30 UT (#1145112-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rao - 2023-09-18 (T+33.6d)
Image below (2023-09-18.956) was taken 33.6 days after discovery of 2023rao
Position of transient (faint but distinct) is shown by white cross-hairs
Measured magnitude +16.35 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-18 23:06 UT (#1146075-79)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rao - 2023-09-22 (T+36.6d)
Image below (2023-09-22.013) was taken 36.6 days after discovery of 2023rao
Position of transient (faint but distinct) is shown by white cross-hairs
Measured magnitude +16.39 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-22 00:25 UT (#1148091-94)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rao - 2023-09-25 (T+40.5d)
Image below (2023-09-25.878) was taken 40.5 days after discovery of 2023rao
Position of transient (faint but distinct) is shown by white cross-hairs
Measured magnitude +16.33 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-25 21:13 UT (#1149030-34)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rao - 2023-12-02 (T+108.4d)
Image below (2023-12-02.821) was taken 108.4 days after discovery of 2023rao
Position of transient (faint & stable) is shown by white cross-hairs
Measured magnitude +16.36 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 19:52 UT (#1171047-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rao - 2024-02-23 (T+191.4d)
Image below (2024-02-23.828) was taken 191.4 days after discovery of 2023rao
Position of transient (faint & stable) is shown by white cross-hairs
Measured magnitude +16.34

Annotated CCD Image (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 19:55 UT (#1190019-20)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rao - 2024-02-24 (T+192.5d)
Image below (2024-02-24.846) was taken 192.5 days after discovery of 2023rao
Position of transient (faint & stable) is shown by white cross-hairs
Measured magnitude +16.25 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 20:27 UT (#1191033-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rbs - Type HPM Transient (discovered 2023-08-31)

AT 2023rbs (Perseus)
AT 2023rbs (Type: HPM) discovered 2023-08-31.443 UT by ZTF
Alias: ZTF23abascus, LP 198-542
Discovery Magnitude 14.06 (r-ZTF Filter)
( TNS 2023rbs )

Starfield with AT 2023rbs (T+69.5d)
with Galaxy PGC 2180144 (catalog +15.9)

Annotated CCD Image (50% size, linear scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 23:33 UT (#1163131-35)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rbs - 2023-09-25 (T+25.5d)
Image below (2023-09-25.955) was taken 25.5 days after discovery of 2023rbs
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +15.36 (Clear Filter

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-25 23:04 UT (#1149064-68)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rbs - 2023-11-08 (T+69.5d)
Image below (2023-11-08.975) was taken 69.5 days after discovery of 2023rbs
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +15.41 (Clear Filter

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 23:33 UT (#1163131-35)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - Type YSO? Transient (discovered 2023-08-24)

AT 2023rfq (Cygnus)
AT 2023rfq (Type: YSO?) discovered 2023-08-24.114 UT by Gaia
Alias: Gaia23cbk
Discovery Mag +13.19 (G-Gaia Filter)
( TNS 2023rfq | Gaia23cbk )

AT 2023rfq - 2023-09-04 (T+11.9d)
Image below (2023-09-04.977) was taken 11.9 days after discovery of 2023rfq
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude ? (unable to insert WCS)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-04 23:35 UT (#1139075-79)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-09-06 (T+13.8d)
Image below (2023-09-06.962) was taken 13.8 days after discovery of 2023rfq
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +13.02 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-06 23:14 UT (#1140039-43)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-09-08 (T+15.8d)
Image below (2023-09-08.942) was taken 15.8 days after discovery of 2023rfq
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +13.04 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-08 22:46 UT (#1141072-76)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-09-09 (T+16.8d)
Image below (2023-09-09.955) was taken 16.8 days after discovery of 2023rfq
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +13.03 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-09 23:04 UT (#1142037-41)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-09-12 (T+19.8d)
Image below (2023-09-12.875) was taken 19.8 days after discovery of 2023rfq
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude ?

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-12 21:07 UT (#1143030-34)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-09-17 (T+23.9d)
Image below (2023-09-17.003) was taken 23.9 days after discovery of 2023rfq
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +13.06 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-17 00:13 UT (#1145086-90)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-09-18 (T+25.7d)
Image below (2023-09-18.850) was taken 25.7 days after discovery of 2023rfq
Position of reported transient is shown by white cross-hairs
Measured magnitude +13.01 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-18 20:33 UT (#1146005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-09-21 (T+27.9d)
Image below (2023-09-21.028) was taken 27.9 days after discovery of 2023rfq
Position of reported transient is shown by white cross-hairs
Measured magnitude +13.00 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-21 00:47 UT (#1147121-24)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-09-21 (T+28.8d)
Image below (2023-09-21.918) was taken 28.8 days after discovery of 2023rfq
Position of reported transient is shown by white cross-hairs
Measured magnitude +12.96 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-21 22:09 UT (#1148029-32)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-09-26 (T+32.9d)
Image below (2023-09-26.019) was taken 32.9 days after discovery of 2023rfq
Position of reported transient is shown by white cross-hairs
Measured magnitude +13.05 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-26 00:35 UT (#1149100-04)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-10-06 (T+42.9d)
Image below (2023-10-06.014) was taken 42.9 days after discovery of 2023rfq
Position of reported transient (distinct, stable) is shown by white cross-hairs
Measured magnitude +13.00 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-06 00:29 UT (#1155051-55)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rfq - 2023-12-02 (T+100.7d)
Image below (2023-12-02.810) was taken 100.7 days after discovery of 2023rfq
Position of reported transient (distinct, stable) is shown by white cross-hairs
Measured magnitude +13.01 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 19:32 UT (#1171042-44)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rgi - Type ulens? Transient (discovered 2023-08-27)

AT 2023rgi (Cepheus)
AT 2023rgi (Type: ulens?) discovered 2023-08-27.945 UT by Gaia
Alias: Gaia23ccc
Discovery Mag 10.98 (G-Gaia Filter) (vs Historic Mag 11.25)
Bright gal.plane source candidate microlensing event
or Be-type outburst rises by 0.3 mag
( TNS 2023rgi | Gaia23ccc )

AT 2023rgi - 2023-09-07 (T+10.1d)
Image below (2023-09-07.081) was taken 10.1 days after discovery of 2023rgi
Position of reported transient is shown by white cross-hairs
Measured magnitude +11.25 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-07 02:06 UT (#1140112-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rgi - 2023-09-08 (T+12.0d)
Image below (2023-09-08.927) was taken 12.0 days after discovery of 2023rgi
Position of reported transient is shown by white cross-hairs
Measured magnitude +10.89 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-08 22:23 UT (#1141065-69)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rgi - 2023-09-09 (T+13.0d)
Image below (2023-09-09.940) was taken 13.0 days after discovery of 2023rgi
Position of reported transient is shown by white cross-hairs
Measured magnitude +11.19 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-09 22:42 UT (#1142030-34)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rgi - 2023-09-12 (T+16.0d)
Image below (2023-09-12.898) was taken 16.0 days after discovery of 2023rgi
Position of reported transient is shown by white cross-hairs
Measured magnitude ? (unable to insert WCS)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-12 21:36 UT (#1143038-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rgi - 2023-09-17 (T+20.1d)
Image below (2023-09-17.025) was taken 20.1 days after discovery of 2023rgi
Position of reported transient is shown by white cross-hairs
Measured magnitude +10.73 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-17 00:45 UT (#1145098-102)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rgi - 2023-09-18 (T+21.9d)
Image below (2023-09-18.872) was taken 21.9 days after discovery of 2023rgi
Position of reported transient is shown by white cross-hairs
Measured magnitude ? (unable to insert WCS)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-18 21:03 UT (#1146030-34)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rsr - CV Type Transient (discovered 2023-09-04) near NGC 947

AT 2023rsr (Perseus)
AT 2023rsr (Type: CV) discovered 2023-09-04.132 UT by Gaia
Alias: Gaia23cfy
Discovery Mag 11.68 (G-Gaia Filter) (vs historic mag 11.97)
~0.25 mag rise in Be star
( TNS 2023rsr | Gaia23cfy )

NGC 957 and AT 2023rsr (T+8.9d)
Position of reported transient (distinct) is shown by white circle.
Member of Open Cluster NGC 957

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-09-13 00:36 UT (#1143121-25)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rsr - 2023-09-09 (T+5.0d)
Image below (2023-09-09.085) was taken 5.0 days after discovery of 2023rsr
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +11.83 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-09-09 02:06 UT (#1141165-69)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rsr - 2023-09-10 (T+5.9d)
Image below (2023-09-10.027) was taken 5.9 days after discovery of 2023rsr
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +11.84 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-09-10 00:42 UT (#1142089-93)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rsr - 2023-09-13 (T+8.9d)
Image below (2023-09-13.023) was taken 8.9 days after discovery of 2023rsr
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +11.71 (Clear Filter)

AT 2023rsr - 2023-09-16 (T+12.8d)
Image below (2023-09-16.910) was taken 12.8 days after discovery of 2023rsr
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +11.75 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-09-16 21:53 UT (#1145027-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rsr - 2023-09-18 (T+14.8d)
Image below (2023-09-18.941) was taken 14.8 days after discovery of 2023rsr
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude ? (Unable to insert WCS)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-09-18 22:38 UT (#1146063-67)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rud - Transient (discovered 2023-09-08)

AT 2023rud (Cassiopeia)
AT 2023rud (Type: unk) discovered 2023-09-08.188 UT by GEOTS
Alias: GEOTS-Balaji-2023-017, TCP J23572531+5241341
Discovery Mag 16.8 (Clear Filter) (vs earlier non-detection with limiting mag 18.0)
Hostless transient
( TNS 2023rud )

AT 2023rud - 2023-09-09 (T+1.8d)
Image below (2023-09-09.971) was taken 1.8 days after discovery of 2023rud
Position of reported transient (not confirmed) is shown by white circle.
Unclear if faint star-like object near to reported coords
(also seen in DSS2 Ref Image) is the transient object or not

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-09-09 23:18 UT (#1142044)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rud - 2023-09-12 (T+4.7d)
Image below (2023-09-12.922) was taken 4.7 days after discovery of 2023rud
Position of reported transient (not confirmed) is shown by white circle.
Unclear if star-like object near to reported coords (also seen in DSS2 Ref Image) is the transient or not
Measured magnitude ? (unable to link image or insert WCS)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-12 22:16 UT (#1143049-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rud - 2023-09-16 (T+8.8d)
Image below (2023-09-16.987) was taken 8.8 days after discovery of 2023rud
Position of reported transient (not confirmed) is shown by white circle.
Unclear if faint star-like object near to reported coords
(also seen in DSS2 Ref Image) is the transient object or not
Note: unable to link image or insert WCS

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-16 23:49 UT (#1145079-83)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rud - 2023-09-19 (T+10.9d)
Image below (2023-09-19.073) was taken 10.9 days after discovery of 2023rud
Position of reported transient (not confirmed) is shown by white circle.
Unclear if star-like object near to reported coords
(also seen in DSS2 Ref Image) is the transient object or not
Note: unable to link image or insert WCS

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-19 01:52 UT (#1146125-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rud - 2023-09-21 (T+13.8d)
Image below (2023-09-21.954) was taken 13.8 days after discovery of 2023rud
Position of reported transient (not confirmed) is shown by white circle.
Unclear if star-like object near to reported coords
(also seen in DSS2 Ref Image) is the transient object or not
Note: unable to link image or insert WCS

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-21 23:03 UT (#1148051-55)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023sqn - CV Type Transient (discovered 2023-09-11) - non-detection

AT 2023sqn (Libra)
AT 2023sqn (Type: CV) discovered 2023-09-11.789 UT by Gaia
Alias: Gaia23cjd
Discovery Magnitude 16.67 (G-Gaia Filter)
vs Historic Magnitude 20.14 +/- 0.25
~3.5 mag outburst in candidate CV MASTER OT J153519.70-063028.9
Gaia, 2023-09-11 18:56:38, mag 16.67
Gaia, 2024-01-19 01:24:19, mag 20.66
Gaia, 2024-01-19 03:10:54, mag 20.21
( TNS 2023sqn | Gaia23cjd )

AT 2023sqn - 2024-04-18 (T+219.3d)
Image below (2024-04-18.040) was taken 219.3 days after discovery of 2023sqn
Position of reported transient (not longer visible) is shown by white cross-hairs
Non-Detection, Limiting Magnitude +18.0 (G-Gaia Filter)
Transient is confirmed to have returned to its normal magnitude range

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-18 01:01 UT (#1209104-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023sqn on Transients 2023 Page >>

AT 2023srv - CV Type Transient (discovered 2023-09-16) - Attempt

AT 2023srv (Cassiopeia)
AT 2023srv (Type: CV) discovered 2023-09-16.171 UT by GEOTS
Alias: GEOTS-Balaji-2023-018, TCP J00452678+5512505
Discovery Magnitude 15.7 (Clear Filter)
vs Prior Non-Detection Limiting Mag 18
Blue continuum dominated spectrum, with a potentially weak narrow absorption feature of H beta.
Considering a probable past outburst in 2013, object is most likely a CV.
( TNS 2023srv )

AT 2023srv - 2023-12-01 (T+76.7d)
Image below (2023-12-01.913) was taken 76.7 days after discovery of 2023srv
No indication of any object at reported position (shown by white cross-hairs)
Non-Detection, Limiting Mag +17.5 (Clear Filter)
Transient most-likely faded to normal magnitude around +20.0 to +21.0
Bright star in FOV is HIP 3544 (mag +5.4)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-01 21:57 UT (#1170127-29)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Galaxies near AT 2023srv (T+76.7d)
Faint galaxies in same FOV as AT 2023srv (faded & no longer visible) are
PGC 137158 (catalog mag +17.0), PGC 137157 (catalog mag ?),
PGC 1371691(catalog mag ?), PGC 137163 (catalog mag ?)
Bright star in FOV is HIP 3544 (mag +5.4)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-01 21:57 UT (#1170127-29)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023srw - CV Type Transient (discovered 2023-09-16)

AT 2023srw (Auriga)
AT 2023srw (Type: CV) discovered 2023-09-16.369 UT by GEOTS
Alias: GEOTS-Balaji-2023-019, TCP J05230786+4420179
Discovery Mag 16.5 (Clear Filter)
( TNS 2023srw )

AT 2023srw - 2023-12-02 (T+77.5d)
Image below (2023-12-02.899) was taken 77.5 days after discovery of 2023srw
Position of reported transient (very faint, fading) is shown by white cross-hairs
Measured magnitude +17.68 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 21:37 UT (#1171103-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023srw on Transients 2023 Page >>

AT 2023tjz - Transient / Carbon Star (discovered 2023-09-17)

AT 2023tjz (Orion)
AT 2023tjz (Type: unk) discovered 2023-09-17.895 UT by Gaia
Alias: Gaia23cnk
Discovery magnitude 12.44 (G-Gaia filter) vs Historic Mag 10.71
Known Carbon star fades by 1.5 mag
( TNS 2023tjz | Gaia23cnk )

AT 2023tjz - Approximate Colour Image (T+52.1d)
AT 2023tjz's red colour is very pronounced

Annotated CCD Image (100% size, linear scale, cropped)
3 x 90s exposure (average combine), 3x3 binning, B Filter
3 x 60s exposure (average combine), 3x3 binning, V Filter
3 x 60s exposure (average combine), 3x3 binning, R Filter
2023-11-09 00:08 UT (#1163152-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2023-09-26 (T+8.2d)
Image below (2023-09-26.065) was taken 8.2 days after discovery of 2023tjz
Position of earlier reported transient (distinct) is shown by white cross-hairs
Measured magnitude +12.72 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-26 01:42 UT (#1149120-24)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2023-10-23 (T+35.3d)
Image below (2023-10-23.184) was taken 35.3 days after discovery of 2023tjz
Position of earlier reported transient (distinct) is shown by white cross-hairs
Measured magnitude +12.87 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-23 04:34 UT (#1158282-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2023-11-07 (T+50.1d)
Image below (2023-11-07.022) was taken 50.1 days after discovery of 2023tjz
Position of earlier reported transient (distinct & stable) is shown by white cross-hairs
Measured magntitude +12.89 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-11-07 00:32 UT (#1161080)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2023-11-08 (T+52.1d)
Image below (2023-11-08.998) was taken 52.1 days after discovery of 2023tjz
Position of earlier reported transient (distinct, stable) is shown by white cross-hairs
Measured magnitude +12.87 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 23:59 UT (#1163149-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2023-11-12 (T+55.2d)
Image below (2023-11-12.092) was taken 55.2 days after discovery of 2023tjz
Position of earlier reported transient (distinct, fading slowly ?) is shown by white cross-hairs
Measured magnitude +12.96 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-12 02:15 UT (#1165173-75)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2023-12-06 (T+79.2d)
Image below (2023-12-06.118) was taken 79.2 days after discovery of 2023tjz
Position of earlier reported transient (distinct, brightening slightly ?) is shown by white cross-hairs
Measured magnitude +12.85 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 02:51 UT (#1172181-83)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2023-12-16 (T+90.0d)
Image below (2023-12-16.863) was taken 90.0 days after discovery of 2023tjz
Position of earlier reported transient (distinct, brightening ?) is shown by white cross-hairs
Measured magnitude +12.61 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-16 20:45 UT (#1173085-87)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2023-12-18 (T+91.2d)
Image below (2023-12-18.051) was taken 91.2 days after discovery of 2023tjz
Position of earlier reported transient (distinct, fading ?) is shown by white cross-hairs
Measured magnitude +12.73 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-18 01:15 UT (#1174087-88)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2023-12-19 (T+92.2d)
Image below (2023-12-19.053) was taken 92.2 days after discovery of 2023tjz
Position of earlier reported transient (distinct, brightening ?) is shown by white cross-hairs
Measured magnitude +12.56 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 01:19 UT (#1175077-79)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2024-01-06 (T+111.1d)
Image below (2024-01-06.960) was taken 111.1 days after discovery of 2023tjz
Position of earlier reported transient (distinct, brightening ?) is shown by white cross-hairs
Measured magnitude +12.57 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-06 23:04 UT (#1179147-49)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2024-02-23 (T+159.0d)
Image below (2024-02-23.934) was taken 159.0 days after discovery of 2023tjz
Position of earlier reported transient (distinct, brightening ?) is shown by white cross-hairs
Measured magnitude +12.21 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 22:26 UT (#1190103-05)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tjz - 2024-02-24 (T+160.0d)
Image below (2024-02-24.917) was taken 160.0 days after discovery of 2023tjz
Position of earlier reported transient (distinct, fading) is shown by white cross-hairs
Measured magnitude +12.31 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 22:02 UT (#1191076-78)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tki - Type XRB Transient (discovered 2023-09-19)

AT 2023tki (Scutum)
AT 2023tki (Type: XRB) discovered 2023-09-19.776 UT by Gaia
Alias: Gaia23cnv
Discovery Magnitude 11.49 (G-Gaia Filter)
vs Historic Magnitude 11.94 +/- 0.07 SD
~0.5 mag rise in Gaia source, aka HMXRB ATO
XRB = X-Ray Binary
( TNS 2023tki | Gaia23cnv )

AT 2023tki - 2024-03-22 (T+184.4d)
Image below (2024-03-22.186) was taken 184.4 days after discovery of 2023tki
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +12.08 (Clear Filter)
Likely faded back to historic level

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-03-22 04:28 UT (#1200113)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - Nova Transient (discovered 2023-09-20)

AT 2023tow (Scutum)
AT 2023tow (Type: Nova) discovered 2023-09-20.778 UT by Gaia
Alias: Gaia23coj, ZTF23abceaws
Discovery Magnitude 12.26 (G-Gaia Filter) vs Historic Magnitude - None
Red bright Galactic plane transient
( TNS 2023tow | Gaia23coj )

AT 2023tow and adjacent starfield (T+14.1d)

Annotated CCD Image (70% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-04 20:28 UT (#1154004-08)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow and adjacent starfield (T+52.0d)

Annotated CCD Image (50% size, linear scale)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-11-11 18:54 UT (#1165008)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - 2023-10-04 (T+14.1d)
Image below (2023-10-04.847) was taken 14.1 days after discovery of 2023tow
Position of reported transient (bright & distinct) is shown by white cross-hairs
Measured Magnitude +12.72 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-04 20:28 UT (#1154004-08)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - 2023-11-08 (T+49.0d)
Image below (2023-11-08.792) was taken 49.0 days after discovery of 2023tow
Position of reported transient (fading) is shown by white cross-hairs
Measured Magnitude +14.31 (Clear Filter)
Poor quality image (bad seeing, low altitude 13°)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 19:10 UT (#1163022-26)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - 2023-11-11 (T+52.0d)
Image below (2023-11-11.788) was taken 52.0 days after discovery of 2023tow
Position of reported transient (stable ?) is shown by white cross-hairs
Measured Magnitude +14.26 (Clear Filter)
(single frame, low altitude 13.3°)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-11-11 18:54 UT (#1165008)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - 2023-11-15 (T+56.0d)
Image below (2023-11-15.763) was taken 56.0 days after discovery of 2023tow
Position of reported transient (fading) is shown by white cross-hairs
Measured Magnitude +14.54 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 18:26 UT (#1167031-34)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - 2024-02-23 (T+155.4d)
Image below (2024-02-23.217) was taken 155.4 days after discovery of 2023tow
Position of earlier transient (no longer visible) is shown by white cross-hairs
Non-Detection, limiting mag +17.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 05:20 UT (#1189243-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - 2024-02-24 (T+156.5d)
Image below (2024-02-24.235) was taken 156.5 days after discovery of 2023tow
Position of earlier transient (no longer visible) is shown by white cross-hairs
Non-Detection

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 05:48 UT (#1190299-303)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - 2024-02-25 (T+157.4d)
Image below (2024-02-25.226) was taken 157.4 days after discovery of 2023tow
Position of earlier transient (no longer visible) is shown by white cross-hairs
Non-Detection

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-25 05:33 UT (#1191296-300)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - 2024-03-16 (T+177.4d)
Image below (2024-03-16.174) was taken 177.4 days after discovery of 2023tow
Position of reported transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection Limiting Mag +17.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-16 04:20 UT (#1198203-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tow - Reference Image (PanSTARRS)
Position of reported Transient shown by mauve crosshairs

AT 2023tow - Possible Progenitor for Transient (PanSTARRS Colour)
Position of reported Transient shown by mauve crosshairs

AT 2023ttx - CV Type Transient (discovered 2023-09-27)

AT 2023ttx (Canis Major)
AT 2023ttx (Type: CV) discovered 2023-09-27.164 UT by Gaia
Alias: Gaia23cqr
Discovery Magnitude 13.71 (G-Gaia Filter) vs Historic Magnitude 14.06 +/- 0.10
~0.3 mag rise in blue Gaia source
( TNS 2023ttx | Gaia23cqr )

AT 2023ttx - 2023-11-09 (T+43.0d)
Image below (2023-11-09.194) was taken 43.0 days after discovery of 2023ttx
Position of reported transient (relatively distinct) is shown by white cross-hairs
Measured Magnitude +13.49 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 04:44 UT (#1163257-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ttx - 2023-12-06 (T+69.9d)
Image below (2023-12-06.094) was taken 69.9 days after discovery of 2023ttx
Position of reported transient (relatively distinct, stable) is shown by white cross-hairs
Measured Magnitude +13.51 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 02:19 UT (#1172167-71)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ttx - 2023-12-18 (T+81.9d)
Image below (2023-12-18.085) was taken 81.9 days after discovery of 2023ttx
Position of reported transient (relatively distinct, brightening) is shown by white cross-hairs
Measured Magnitude +12.57 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-18 02:06 UT (#1174131-35)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - CV Type Transient (discovered 2023-09-29) near NGC 6834

AT 2023tvi (Cygnus)
AT 2023tvi (Type: CV) discovered 2023-09-29.797 UT by Gaia
Alias: Gaia23crr
Discovery magnitude 12.90 (G-Gaia filter) vs Historic magnitude 13.13
Bright blue gal.plane source rises by 0.2 mag
( TNS 2023tvi | Gaia23crr )

AT 2023tvi - 2023-10-04 (T+5.1d)
Image below (2023-10-04.931) was taken 5.1 days after discovery of 2023tvi
Position of reported transient (distinctt) is shown by white cross-hairs
Measured magntitude +13.02

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-04 22:24 UT (#1154051-55)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - 2023-10-06 (T+6.2d)
Image below (2023-10-06.003) was taken 6.2 days after discovery of 2023tvi
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +12.79

Annotated CCD Image (100% size, linear scale, cropped)
60s exposure (single frame), 3x3 binning, Clear Filter
2023-10-06 00:04 UT (#1155043)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - 2023-10-22 (T+23.0d)
Image below (2023-10-22.837) was taken 23.0 days after discovery of 2023tvii
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +12.89

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 20:08 UT (#1158064-68)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - 2023-11-07 (T+39.2d)
Image below (2023-11-07.976) was taken 39.2 days after discovery of 2023tvi
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +12.85

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-07 23:29 UT (#1162098-102)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - 2023-11-08 (T+40.1d)
Image below (2023-11-08.865) was taken 40.1 days after discovery of 2023tvi
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +12.80

Annotated CCD Image (100% size, linear scale, cropped)
2 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 20:47 UT (#1163060-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - 2023-11-09 (T+41.0d)
Image below (2023-11-09.776) was taken 41.0 days after discovery of 2023tvi
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +12.90 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 18:41 UT (#1164005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - 2023-11-11 (T+43.1d)
Image below (2023-11-11.917) was taken 43.1 days after discovery of 2023tvi
Position of reported transient (distinct, stable) is shown by white cross-hairs
Measured magntitude +12.88 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-11 22:04 UT (#1165070-74)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - 2023-11-15 (T+47.0d)
Image below (2023-11-15.845) was taken 47.0 days after discovery of 2023tvi
Position of reported transient (distinct, stable) is shown by white cross-hairs
Measured magntitude +12.85 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 20:20 UT (#1167117-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - 2023-11-30 (T+62.1d)
Image below (2023-11-30.878) was taken 62.1 days after discovery of 2023tvi
Position of reported transient (distinct, stable) is shown by white cross-hairs
Measured magntitude +12.84 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-30 21:08 UT (#1169071-75)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tvi - 2023-12-16 (T+78.0d)
Image below (2023-12-16.816) was taken 78.0 days after discovery of 2023tvi
Position of reported transient (distinct, stable) is shown by white cross-hairs
Measured magntitude +12.75 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-16 19:38 UT (#1173054-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Other Images

Starfield around AT 2023tvi (T+23.0d)
with NGC 6834 (Hershel VIII 16) in lower right

Annotated CCD Image (50% size, square root scale)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 20:08 UT (#1158064-68)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 6834 (Herschel VIII-16) - Open Cluster
Starfield showing AT 2023tvi (T+5.1d) in relationship to NGC 6834
[ Open Star Clusters ] [ Herschel 400 Objects ]

Annotated CCD Image (70% size, linear scale)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-04 22:24 UT (#1154051-55)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 6834 (Hershel VIII 16) - Earlier Image (Jul 2018)

Annotated CCD Image (70% size, linear scale)
9 x 15 sec exposure (average combine), 3x3 binning, C Filter
2018-07-25 23:44 UT (#616078-86)
12" LX200R (at f/10.4) + ST-10XME

AT 2023txn - CV Type Transient (discovered 2023-09-29)

AT 2023txn (Cygnus)
AT 2023txn (Type: CV) discovered 2023-09-29.797 UT by Gaia
Alias: Gaia23cse
Discovery magnitude 11.83 (G-Gaia) vs Historic Mag 13.14
Red Galactic plane source brightens erratically by 2 mag & becomes bluer
( TNS 2023txn | Gaia23cse )

AT 2023txn - 2023-10-04 (T+5.1d)
Image below (2023-10-04.938) was taken 5.1 days after discovery of 2023txn
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +12.08 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-04 22:34 UT (#1154058-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2023-10-05 (T+6.2d)
Image below (2023-10-05.963) was taken 6.2 days after discovery of 2023txn
Position of reported transient (distinct, stable) is shown by white cross-hairs
Measured magntitude +12.08 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-05 23:08 UT (#1155019-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2023-10-22 (T+23.0d)
Image below (2023-10-22.844) was taken 23.0 days after discovery of 2023txn
Position of reported transient (distinct, fading slowly ?) is shown by white cross-hairs
Measured magntitude +12.25 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 20:19 UT (#1158071-75)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2023-11-01 (T+32.2d)
Image below (2023-11-01.035) was taken 32.2 days after discovery of 2023txn
Position of reported transient (distinct, stable ?) is shown by white cross-hairs
Measured magntitude +12.24 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
60s exposure (single frame), 3x3 binning, Clear Filter
2023-11-01 00:51 UT (#1159030)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2023-11-06 (T+38.0d)
Image below (2023-11-06.822) was taken 38.0 days after discovery of 2023txn
Position of reported transient (distinct, stable ?) is shown by white cross-hairs
Measured magntitude +12.28 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-06 19:47 UT (#1161005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2023-11-08 (T+40.1d)
Image below (2023-11-08.886) was taken 40.1 days after discovery of 2023txn
Position of reported transient (distinct, fading slowly) is shown by white cross-hairs
Measured magntitude +12.31 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 21:19 UT (#1163071-75)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2023-11-09 (T+41.0d)
Image below (2023-11-09.841) was taken 41.0 days after discovery of 2023txn
Position of reported transient (distinct, brightening again ?) is shown by white cross-hairs
Measured magntitude +12.14 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 20:12 UT (#1164049-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2023-11-11 (T+43.0d)
Image below (2023-11-11.825) was taken 43.0 days after discovery of 2023txn
Position of reported transient (distinct, fading again) is shown by white cross-hairs
Measured magntitude +12.38 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-11 19:51 UT (#1165036-40)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2023-11-15 (T+47.1d)
Image below (2023-11-15.853) was taken 47.1 days after discovery of 2023txn
Position of reported transient (distinct, fading) is shown by white cross-hairs
Measured magntitude +12.52 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 20:31 UT (#1167124-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2023-11-30 (T+62.0d)
Image below (2023-11-30.791) was taken 62.0 days after discovery of 2023txn
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +12.45 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-30 19:02 UT (#1169021-25)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2024-02-24 (T+147.4d)
Image below (2024-02-24.183) was taken 147.4 days after discovery of 2023txn
Position of reported transient (distinct, fading) is shown by white cross-hairs
Measured magntitude +12.79 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 04:27 UT (#1190255-59)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2024-03-16 (T+168.3d)
Image below (2024-03-16.144) was taken 168.3 days after discovery of 2023txn
Position of reported transient (distinct but fading) is shown by white cross-hairs
Measured magntitude +12.84 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-16 03:30 UT (#1198182-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2024-03-22 (T+174.3d)
Image below (2024-03-22.126) was taken 174.3 days after discovery of 2023txn
Position of reported transient (distinct but fading) is shown by white cross-hairs
Measured magntitude +12.79 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-03-22 03:04 UT (#1200064-68)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2024-04-11 (T+194.3d)
Image below (2024-04-11.135) was taken 194.3 days after discovery of 2023txn
Position of reported transient (fading) is shown by white cross-hairs
Measured magntitude +12.91 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-11 03:18 UT (#1206111-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023txn - 2024-04-13 (T+196.3d)
Image below (2024-04-13.084) was taken 196.3 days after discovery of 2023txn
Position of reported transient (stable ?) is shown by white cross-hairs
Measured magntitude +12.89 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-13 02:04 UT (#1207073-77)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tws - CV Type Transient (discovered 2023-10-01)

AT 2023tws (Draco)
AT 2023tws (Type: CV) discovered 2023-10-01.073 UT by Gaia
Alias: Gaia23csd
Discovery Magnitude 14.91 (G-Gaia Filter)
vs Historic Mag 16.63 +/- 0.33 SD
Outburst in known CV
Gaia, 2023-10-01 01:45. mag 14.91
Gaia, 2023-10-30 21:15, mag 16.71
Gaia, 2023-12-31 18:43, mag 16.39
( TNS 2023tws | Gaia23csd )

AT 2023tws - 2023-12-01 (T+61.8d)
Image below (2023-12-01.842) was taken 61.8 days after discovery of 2023tws
Position of reported transient (faint but relatively distinct) is shown by white cross-hairs
Measured Mag +16.30 (Clear Filter)
Transient appears to have returned to close to historic mag range (16.30 to 16.99)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-01 20:16 UT (#1170072-76)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023twu - Type HPM Transient (discovered 2023-10-01)

AT 2023twu (Canis Minor)
AT 2023twu (Type: HPM) discovered 2023-10-01.748 UT by MASTER
Alias: MASTER OT J072725.46+051206.3
Discovery magnitude 9.1 (Clear Filter)
vs Previous Mag > 17.7 (limiting flux)
( TNS 2023twu )

AT 2023twu - 2023-11-06 (T+35.5d)
Image below (2023-11-06.224) was taken 35.5 days after discovery of 2023twu
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +10.86 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-11-06 05:22 UT (#1160094)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023twu - 2023-11-07 (T+36.3d)
Image below (2023-11-07.000) was taken 36.3 days after discovery of 2023twu
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +8.59 ? (Clear Filter)
Poor quality image (poor seeing/guiding, single frame

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-11-07 00:00 UT (#1161075)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023twu - 2023-11-08 (T+37.4d)
Image below (2023-11-08.128) was taken 37.4 days after discovery of 2023twu
Position of reported transient (bright) is shown by white cross-hairs
Measured magnitude +10.22 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 03:10 UT (#1162229-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023twu - 2023-11-09 (T+38.4d)
Image below (2023-11-09.130) was taken 38.4 days after discovery of 2023twu
Position of reported transient (bright, fading) is shown by white cross-hairs
Measured magnitude +10.67 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 03:14 UT (#1163224-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023twu - 2023-11-12 (T+41.3d)
Image below (2023-11-12.008) was taken 41.3 days after discovery of 2023twu
Position of reported transient (bright, brightening slightly ?) is shown by white cross-hairs
Measured magnitude +10.48 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-12 00:21 UT (#1165113-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023twu - 2023-12-06 (T+65.3d)
Image below (2023-12-06.078) was taken 65.3 days after discovery of 2023twu
Position of reported transient (bright, fading ?) is shown by white cross-hairs
Measured magnitude +10.81(Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 01:59 UT (#1172160-64)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023twu - 2023-12-18 (T+78.2d)
Image below (2023-12-18.960) was taken 78.2 days after discovery of 2023twu
Position of reported transient (bright, brightening ?) is shown by white cross-hairs
Measured magnitude +10.14 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-18 23:09 UT (#1175016-19)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023uzx - CV Type Transient (discovered 2023-10-13)

AT 2023uzx (Cassiopeia)
AT 2023uzx (Type: CV) discovered 2023-10-13.335 UT by Gaia
Alias: Gaia23cwq
Discovery Mag 11.96 (G-Gaia Filter) vs Historic Magnitude 12.23 +/- 0.04 SD
~0.2 mag rise in Gaia source, previous events seen
( TNS 2023uzx | Gaia23cwq )

AT 2023uzx - 2023-12-02 (T+50.7d)
Image below (2023-12-02.997) was taken 50.7 days after discovery of 2023uzx
Position of reported transient (distinct) is shown by white cross-hairs
Measured magnitude +11.53 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 23:59 UT (#1171163-67)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023uzx - 2023-11-30 (T+48.6d)
Image below (2023-11-30.888) was taken 48.6 days after discovery of 2023uzx
Position of reported transient (distinct, stable or brightening ?) is shown by white cross-hairs
Measured magnitude +11.46 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-30 21:22 UT (#1169078-82)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vqb - Type ulens? Transient (discovered 2023-10-16)

AT 2023vqb (Camelopardalis)
AT 2023vqb (Type: ulens?) discovered 2023-10-16.099 UT by Gaia
Alias: Gaia23cxl
Discovery Mag 14.51 (G-Gaia Filter)
vs Historic Mag 14.86 +/- 0.10 SD
Bright gal.plane source candidate microlensing event or Be-type outburst rises by 0.3 mag
( TNS 2023vqb | Gaia23cxl )

AT 2023vqb - 2024-02-21 (T+128.8d)
Image below (2024-02-21.938) was taken 128.8 days after discovery of 2023vqb
Position of reported transient (likely faded back to normal state) is shown by white cross-hairs
Measured Magnitude +13.45 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-21 22:39 UT (#1188087-91)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vqb - Detail (T+128.8d)
Star appears to be a double star

Annotated CCD Image (250% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-21 22:39 UT (#1188087-91)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023vqb on Transients 2023 Page >>

AT 2023vww - CV Type Transient (discovered 2023-10-27)

AT 2023vww (Auriga)
AT 2023vww (Type: CV) discovered 2023-10-27.236 UT by GEOTS
Alias: GEOTS-Balaji-2023-020, TCP J05233714+4240570, Gaia23daz
Discovery magnitude 15.9 (Clear Filter)
vs Prior Non-Detection Limiting Mag 18.0
Apparently hostless transient
( TNS 2023vww | Gaia23daz )

AT 2023vww - 2024-02-23 (T+119.6d)
Image below (2024-02-23.867) was taken 119.6 days after discovery of 2023vww
Position of earlier transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magntitude +18.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 20:51 UT (#1190056-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wba - CV Type Transient (discovered 2023-10-29), Attempt

AT 2023wba (Cassiopeia)
AT 2023wba (Type: CV) discovered 2023-10-29.583 UT by XOSS
Alias: XM124MZ, TCP J23260001+6143251
Discovery magnitude 16.14 (Clear Filter)
( TNS 2023wba )

AT 2023wba - 2023-11-15 (T+17.3d)
Image below (2023-11-15.894) was taken 17.3 days after discovery of 2023wba
Position of earlier transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.8 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 21:31 UT (#1167153-57)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - CV Type Transient (discovered 2023-10-30)

AT 2023wbv (Perseus)
AT 2023wbv (Type: CV) discovered 2023-10-30.032 UT by MASTER
Alias: MASTER OT J041624.14+392546.7
Discovery magnitude 11.9 (Clear Filter)
( TNS 2023wbv )

AT 2023wbv - 2023-11-08 (T+9.0d)
Image below (2023-11-08.051) was taken 9.0 days after discovery of 2023wbv
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +11.51 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 01:15 UT (#1162170-72)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - 2023-11-09 (T+10.1d)
Image below (2023-11-09.089) was taken 10.1 days after discovery of 2023wbv
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +11.63 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 02:10 UT (#1163204-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - 2023-11-10 (T+11.0d)
Image below (2023-11-10.044) was taken 11.0 days after discovery of 2023wbv
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +11.76 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-10 01:07 UT (#1164131-35)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - 2023-11-12 (T+13.0d)
Image below (2023-11-12.030) was taken 13.0 days after discovery of 2023wbv
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +11.66 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-12 00:46 UT (#1165137-41)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - 2023-11-16 (T+17.0d)
Image below (2023-11-16.030) was taken 17.0 days after discovery of 2023wbv
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +11.48 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-16 00:46 UT (#1167237-41)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - 2023-12-01 (T+32.0d)
Image below (2023-12-01.004) was taken 32.0 days after discovery of 2023wbv
Position of reported transient (distinct, fading ?) is shown by white cross-hairs
Measured magntitude +11.58 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-01 00:09 UT (#1169173-77)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - 2023-12-03 (T+34.0d)
Image below (2023-12-03.006) was taken 34.0 days after discovery of 2023wbv
Position of reported transient (bright & distinct) is shown by white cross-hairs
Measured magntitude +11.57 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-03 00:10 UT (#1171170-73)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - 2024-01-07 (T+69.9d)
Image below (2024-01-07.927) was taken 69.9 days after discovery of 2023wbv
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +11.75 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-07 22:17 UT (#1180068-70)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - 2024-02-23 (T+116.9d)
Image below (2024-02-23.891) was taken 116.9 days after discovery of 2023wbv
Position of reported transient (distinct, fading) is shown by white cross-hairs
Measured magntitude +12.24 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 21:26 UT (#1190070-74)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wbv - 2024-02-24 (T+117.9d)
Image below (2024-02-24.885) was taken 117.9 days after discovery of 2023wbv
Position of reported transient (distinct) is shown by white cross-hairs
Measured magntitude +12.19 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 21:17 UT (#1191054-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wox - Type YSO Transient (discovered 2023-10-28)

AT 2023wox (Orion)
AT 2023wox (Type: YSO) discovered 2023-10-28.899 UT by Gaia
Alias: Gaia23dah
Discovery magnitude 16.18 (G-Gaia Filter) vs Historic Magnitude 16.39 +/- 0.06 (SD)
Long slow brightening in YSO
( TNS 2023wox | Gaia23dah )

AT 2023wox (T+35.1d) and adjacent nebulosity
Star field lying midway between NGC 1977 and M42

Annotated CCD Image (50% size, square root scale)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 23:43 UT (#1171156-59)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wox - 2023-12-02 (T+34.2d)
Image below (2023-12-02.066) was taken 34.2 days after discovery of 2023wox
Position of reported transient (faint) is shown by white cross-hairs
Measured magntitude, Transient + Adjacent Star : +15.38 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 01:43 UT (#1170224-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wox - 2023-12-02 (T+35.1d)
Image below (2023-12-02.984) was taken 35.1 days after discovery of 2023wox
Position of reported transient (faint) is shown by white cross-hairs
Measured magntitude, Transient + Adjacent Star : +15.58 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 23:43 UT (#1171156-59)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wue - Transient (discovered 2023-10-28)

AT 2023wue (Auriga)
AT 2023wue (Type: unk) discovered 2023-10-28.420 UT by ZTF
Alias: ZTF23abnoapt
Discovery magnitude 15.98 (g-ZTF Filter)
( TNS 2023wue )

AT 2023wue - 2024-01-07 (T+71.6d)
Image below (2024-01-07.974) was taken 71.6 days after discovery of 2023wue
Position of reported transient (no longer visible) is shown by white cross-hairs
No detection, limiting magnitude +19.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-07 23:30 UT (#1180100-03)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xum - Type CV? Transient (discovered 2023-11-14)

AT 2023xum (Perseus)
AT 2023xum (Type: CV?) discovered 2023-11-14.749 UT by XOSS
Alias: KATS23V005, ZTF23abrajyk, TCP J03570301+3559384
Discovery magnitude 16.57 (Clear Filter)
UG candidate classified by XOSS
( TNS 2023xum )

AT 2023xum - 2023-11-30 (T+16.2d)
Image below (2023-11-30.990) was taken 16.2 days after discovery of 2023xum
Position of reported transient (very faint) is shown by white cross-hairs
Measured magntitude +18.50 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-30 23:54 UT (#1169166-70)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xum - 2023-12-06 (T+21.3d)
Image below (2023-12-06.010) was taken 21.3 days after discovery of 2023xum
Position of reported transient (very faint) is shown by white cross-hairs
Measured magntitude +18.67 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 00:24 UT (#1172118-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xum - 2024-02-21 (T+99.1d)
Image below (2024-02-21.845) was taken 99.1 days after discovery of 2023xum
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection, Limiting Magntitude +19.0 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-21 20:24 UT (#1188019-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wvl - CV Type Transient (discovered 2023-11-06)

AT 2023wvl (Cygnus)
AT 2023wvl (Type: CV) discovered 2023-11-06.700 UT by XOSS
Alias: KATS23V002, TCP J19582065+5506531
Discovery magnitude 12.9 (Clear Filter)
The spectral characteristics and an outburst amplitude of about 8 mag
(above a quiescent level of Vmag=21.3) suggest AT 2023wvl is a dwarf nova .
( TNS 2023wvl )

Starfield with AT 2023wvl (T+2.3d)
Two bright stars in image are
SAO 32161 (catalog mag +8.39) & SAO 32148 (catalog mag +8.52)

Annotated CCD Image (50% size, linear scale)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 22:54 UT (#1163117-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wvl - 2023-11-08 (T+2.3d)
Image below (2023-11-08.952) was taken 2.3 days after discovery of 2023wvl
Position of reported transient (relatively distinct) is shown by white cross-hairs
Measured magntitude +12.84 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 22:54 UT (#1163117-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wvl - 2023-11-09 (T+3.3d)
Image below (2023-11-09.988) was taken 3.3 days after discovery of 2023wvl
Position of reported transient (relatively distinct) is shown by white cross-hairs
Measured magntitude +12.98 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
60s exposure (single frame), 3x3 binning, Clear Filter
2023-11-09 23:43 UT (#1164115)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wvl - 2023-11-11 (T+5.1d)
Image below (2023-11-11.808) was taken 5.1 days after discovery of 2023wvl
Position of reported transient (relatively distinct, fading) is shown by white cross-hairs
Measured magntitude +13.29 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-11 19:27 UT (#1165022-26)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wvl - 2023-11-12 (T+6.2d)
Image below (2023-11-12.871) was taken 6.2 days after discovery of 2023wvl
Position of reported transient (relatively distinct, fading) is shown by white cross-hairs
Measured magntitude +13.41 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-12 20:56 UT (#1166024-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wvl - 2023-11-15 (T+9.3d)
Image below (2023-11-15.991) was taken 9.3 days after discovery of 2023wvl
Position of reported transient (relatively distinct, fading) is shown by white cross-hairs
Measured magntitude +13.63 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 23:50 UT (#1167216-20)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wvl - 2023-11-30 (T+24.2d)
Image below (2023-11-30.860) was taken 24.2 days after discovery of 2023wvl
Position of reported transient (relatively faint, fading) is shown by white cross-hairs
Measured magntitude +14.78 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-11-30 20:41 UT (#1169054-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wvl - 2024-02-21 (T+107.3d)
Image below (2024-02-21.968) was taken 107.3 days after discovery of 2023wvl
Position of reported transient (no longer visible) is shown by white cross-hairs
Non-Detection, Limiting Magntitude +17.5 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-21 23:16 UT (#1188102-05)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023wvm - CV Type Transient (discovered 2023-11-06) - Attempt

AT 2023wvm (Lacerta)
AT 2023wvm (Type: CV) discovered 2023-11-06.736 UT by XOSS
Alias: KATS23V003, TCP J22020036+3949356
Discovery Magnitude 16.03 (Clear Filter)
Spectrum of a CV, with Balmer lines in absorption,
H-beta stronger than H-alpha
( TNS 2023wvm )

AT 2023wvm - 2023-12-01 (T+25.1d)
Image below (2023-12-01.797) was taken 25.1 days after discovery of 2023wvm
No indication of any object at reported position (shown by white cross-hairs)
Non-Detection, Limiting Mag +18.5 (Clear Filter)
Transient most-likely faded to normal magnitude of > +20.0

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-01 19:09 UT (#1170047-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xvv - CV Type Transient (discovered 2023-11-02)

AT 2023xvv (Cygnus)
AT 2023xvv (Type: CV) discovered 2023-11-02.121 UT by ZTF
Alias: ZTF23aboelln, Gaia23dkh
Discovery Magnitude 15.92 (r-ZTF Filter)
vs Prior Non-Detection Limiting Mag 17.31
Outburst in candidate CV
Gaia, 2023-11-27 14:02, mag 17.82
Gaia, 2023-12-25 05:57, mag 19.99
Gaia, 2024-01-21 05:47, mag 20.76
( TNS 2023xvv | Gaia23dkh )

AT 2023xvv - 2023-12-01 (T+29.7d)
Image below (2023-12-01.774) was taken 29.7 days after discovery of 2023xvv
Position of reported transient (faint but relatively distinct) is shown by white cross-hairs
Measured Mag +17.68 (Clear Filter)
Transient appears to have fading and returning
towards probable normal mag range (19.0 to 21.0)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-01 18:41 UT (#1170033-36)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xvv - 2024-02-16 (T+106.7d)
Image below (2024-02-16.860) was taken 106.7 days after discovery of 2023xvv
Position of reported transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection, Limiting Magnitude +17.8 (Clear Filter)
Transient appears to have fading and returning
towards probable normal mag range (19.0 to 21.0)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-16 20:46 UT (#1186058-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xzr - Type YSO Transient (2023-11-08) in M42

AT 2023xzr (Orion)
AT 2023xzr (Type: YSO) discovered 2023-11-08.655 UT by Gaia
Alias: Gaia23dcm
Discovery magnitude 16.18 (G-Gaia Filter) vs Historic Magnitude 16.39 +/- 0.06 (SD)
Long slow brightening in YSO
( TNS 2023xzr | Gaia23dcm )

AT 2023xzr (T+24.4d) and adjacent nebulosity in M42

Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-03 00:27 UT (#1171177-81)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xzr - 2023-12-02 (T+23.4d)
Image below (2023-12-02.056) was taken 23.4 days after discovery of 2023xzr
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magntitude +12.79 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 01:25 UT (#1170219-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xzr - 2023-12-03 (T+24.4d)
Image below (2023-12-03.014) was taken 24.4 days after discovery of 2023xzr
Position of reported transient (distinct, fading) is shown by white cross-hairs
Measured Magntitude +12.92 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-03 00:27 UT (#1171177-81)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xzr - 2023-12-06 (T+27.4d)
Image below (2023-12-06.103) was taken 27.4 days after discovery of 2023xzr
Position of reported transient (distinct, fading) is shown by white cross-hairs
Measured Magntitude +13.28 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 02:34 UT (#1172174-77)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023xzr - 2024-02-16 (T+100.2d)
Image below (2024-02-16.821) was taken 100.2 days after discovery of 2023xzr
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magntitude +13.18 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-16 19:48 UT (#1186035-38)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ydp - CV Type Transient, FO Aql (discovered 2023-11-14)

AT 2023ydp (Aquila)
AT 2023ydp (Type: CV) discovered 2023-11-14.762 UT by Gaia
Alias: Gaia23det
Discovery Magnitude 13.54 (G-Gaia Filter)
vs Historic Magnitude 14.98 +/- 0.63 SD
Outburst in known CV FO Aql
( TNS 2023ydp | Gaia23det )

AT 2023ydp - 2023-12-26 (T+42.0d)
Image below (2023-12-26.726) was taken 42.0 days after discovery of 2023ydp
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +16.14 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-26 17:28 UT (#1177005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023yen - CV Type Transient (discovered 2023-11-16)

AT 2023yen (Canis Minor)
AT 2023yen (Type: CV) discovered 2023-11-16.384 UT by Gaia
Alias: Gaia23dfz
Discovery Magnitude 16.47 (G-Gaia Filter)
vs Historic Magnitude 17.64 +/- 0.33 SD
Outburst in candidate CV
( TNS 2023yen | Gaia23dfz )

AT 2023yen - 2023-12-02 (T+15.8d)
Image below (2023-12-02.149) was taken 15.8 days after discovery of 2023yen
Position of reported transient (faint but relatively distinct) is shown by white cross-hairs
Measured Mag +17.44 (Clear Filter)
Transient appears to have faded back to historic mag range (17.31 to 19.97)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 03:38 UT (#1170281-85)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023yvv - CV Type Transient (discovered 2023-12-04)

AT 2023yvv (Cepheus)
AT 2023yvv (Type: CV) discovered 2023-12-04.978 UT by MASTER
Alias: MASTER OT J220107.41+573515.3
Discovery Magnitude 14.20 (Clear Filter)
vs Prior Non-Detection with Limiting Mag 19.4
( TNS 2023yvv )

AT 2023yvv - 2023-12-26 (T+21.8d)
Image below (2023-12-26.734) was taken 21.8 days after discovery of 2023yvv
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +14.10 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-26 17:40 UT (#1177012-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023yyz - Type YSO Transient (discovered 2023-12-01)

AT 2023yyz (Cepheus)
AT 2023yyz (Type: YSO) discovered 2023-12-01.271 UT by Gaia
Alias: Gaia23dmc
Discovery Magnitude 13.94 (G-Gaia Filter)
vs Prior Non-Detection, limiting magnitude 21.5 (G-Gaia Filter) ?
vs Historic Magnitude 14.54 +/- 0.17 SD
( TNS 2023yyz | Gaia23dmc )

AT 2023yyz - 2023-12-18 (T+16.7d)
Image below (2023-12-18.019) was taken 16.7 days after discovery of 2023yyz
Position of reported transient (relatively distinct) is shown by white cross-hairs
Measured Magnitude +13.07 (Clear Filter)
Single frame only

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-12-18 00:27 UT (#1174065)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023zzs - CV Type Transient (discovered 2023-12-12)

AT 2023zzs (Cassiopeia)
AT 2023zzs (Type: CV) discovered 2023-12-12.272 UT by Gaia
Alias: Gaia23dpo
Discovery Magnitude 13.62 (G-Gaia Filter)
vs Historic Magnitude 13.80 +/- 0.04 SD
0.2 mag brightening in Galactic plane source
( TNS 2023zzs | Gaia23dpo )

AT 2023zzs - 2023-12-17 (T+5.7d)
Image below (2023-12-17.999) was taken 5.7 days after discovery of 2023zzs
Position of reported transient (relatively distinct) is shown by white cross-hairs
Measured Magnitude +13.93 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-18 00:01 UT (#1174045-49)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aais - CV Type Transient (discovered 2023-12-16)

AT 2023aais (Monoceros)
AT 2023aais (Type: CV) discovered 2023-12-16.898 UT by XOSS
Alias: KATS23Y001, TCP J07345794-0249283
Discovery Magnitude 15.66 (Clear Filter)
( TNS 2023aais )

AT 2023aais - 2024-02-20 (T+65.9d)
Image below (2024-02-20.848) was taken 65.9 days after discovery of 2023aais
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.2 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-20 20:24 UT (#1187007-11)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaky - CV Type Transient (discovered 2023-12-15) near NGC 957

AT 2023aaky (Perseus)
AT 2023aaky (Type: CV) discovered 2023-12-15.096 UT by Gaia
Alias: Gaia23dql
Discovery magnitude 11.62 (G-Gaia Filter)
vs Historic Magnitude 11.97 +/- 0.07 SD
Bright Gaia source brightens by 0.4 mag, previous events seen
( TNS 2023aaky | Gaia23dql )

NGC 957 and AT 2023aaky (T+23.8d)

Annotated CCD Image (50% size, linear scale)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-07 22:06 UT (#1180061-64)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaky - 2023-12-19 (T+3.9d)
Image below (2023-12-19.015) was taken 3.9 days after discovery of 2023aaky
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +11.81 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 00:25 UT (#1175050-54)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaky - 2023-12-19 (T+4.7d)
Image below (2023-12-19.824) was taken 4.7 days after discovery of 2023aaky
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +11.80 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 19:49 UT (#1176027-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaky - 2024-01-07 (T+23.8d)
Image below (2024-01-07.919) was taken 23.8 days after discovery of 2023aaky
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +11.83 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-07 22:06 UT (#1180061-64)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaky - 2024-02-12 (T+59.8d)
Image below (2024-02-12.912) was taken 59.8 days after discovery of 2023aaky
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +11.92 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-12 21:56 UT (#1184027-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaky - 2024-02-13 (T+60.8d)
Image below (2024-02-13.874) was taken 60.8 days after discovery of 2023aaky
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +11.86 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-13 21:02 UT (#1185057-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aanv - CV Type Transient (discovered 2023-12-19)

AT 2023aanv (Cygnus)
AT 2023aanv (Type: CV) discovered 2023-12-19.681 UT by MASTER
Alias: MASTER OT J202117.51+304929.2
Discovery Magnitude 12.20 (Clear Filter)
vs Prior Non-Detection with Limiting Mag 18.9
Mira type variable in max
( TNS 2023aanv )

AT 2023aanv - 2023-12-26 (T+7.1d)
Image below (2023-12-26.742) was taken 7.1 days after discovery of 2023aanv
Position of reported transient (distinct) is shown by white cross-hairs
Measured Magnitude +12.65 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-12-26 17:51 UT (#1177019-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aanv - 2024-02-24 (T+66.4d)
Image below (2024-02-24.101) was taken 66.4 days after discovery of 2023aanv
Position of reported transient (distinct, fading) is shown by white cross-hairs
Measured Magnitude +13.17 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 02:28 UT (#1190194-97)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aanv - 2024-02-25 (T+67.5d)
Image below (2024-02-25.200) was taken 67.5 days after discovery of 2023aanv
Position of reported transient (distinct, fading) is shown by white cross-hairs
Measured Magnitude +13.42 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-25 04:50 UT (#1191275-78)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aanv - 2024-04-14 (T+116.4d)
Image below (2024-04-14.088) was taken 116.4 days after discovery of 2023aanv
Position of reported transient (fading) is shown by white cross-hairs
Measured Magnitude +14.30 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-14 02:10 UT (#1208077-81)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaur - CV Type Transient (discovered 2023-12-20)

AT 2023aaur (Cassiopeia)
AT 2023aaur (Type: CV) discovered 2023-12-20.345 UT by Gaia
Alias: Gaia23dsf
Discovery magnitude 16.58 (G-Gaia filter) vs Historic Mag 18.81 +/- 0.73 SD
Outburst in candidate CV
( TNS 2023aaur | Gaia23dsf )

AT 2023aaur - 2024-01-06 (T+17.5d)
Image below (2024-01-06.803) was taken 17.5 days after discovery of 2023aaur
Position of earlier reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-06 19:20 UT (#1179053-57)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023abtv - CV Type Transient (discovered 2023-12-26)

AT 2023abtv (Pegasus)
AT 2023abtv (Type: CV) discovered 2023-12-26.986 UT by Gaia
Alias: Gaia23duv
Discovery magnitude 12.07 (G-Gaia Filter)
vs Historic Magnitude 13.38 +/- 0.57 (SD)
Gaia and WISE source brightens by 2 mag
( TNS 2023abtv | Gaia23duv )

AT 2023abtv - 2024-01-07 (T+11.8d)
Image below (2024-01-07.815) was taken 11.8 days after discovery of 2023abtv
Position of reported transient (no longer visible) is shown by white cross-hairs
Measured Magnitude +12.10 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-07 19:37 UT (#1180005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023abtv - 2024-01-12 (T+16.8d)
Image below (2024-01-12.768) was taken 16.8 days after discovery of 2023abtv
Position of reported transient (bright) is shown by white cross-hairs
Measured Magnitude +12.06 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-12 18:29 UT (#1181032-36)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023abtv - 2024-02-23 (T+58.2d)
Image below (2024-02-23.209) was taken 58.2 days after discovery of 2023abtv
Position of reported transient (bright) is shown by white cross-hairs
Measured Magnitude +12.07 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 05:04 UT (#1189236-40)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023abtv - 2024-02-24 (T+59.2d)
Image below (2024-02-24.200) was taken 59.2 days after discovery of 2023abtv
Position of reported transient (bright) is shown by white cross-hairs
Measured Magnitude +11.98 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 04:50 UT (#1190270-73)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023abtv - 2024-02-25 (T+60.2d)
Image below (2024-02-25.208) was taken 60.2 days after discovery of 2023abtv
Position of reported transient (bright) is shown by white cross-hairs
Measured Magnitude +11.94 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-25 05:04 UT (#1191282-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023abtv - 2024-02-26 (T+61.2d)
Image below (2024-02-26.201) was taken 61.2 days after discovery of 2023abtv
Position of reported transient (bright) is shown by white cross-hairs
Measured Magnitude +11.91 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-02-26 04:52 UT (#1192152-56)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023abtv - 2024-04-13 (T+108.1d)
Image below (2024-04-13.100) was taken 108.1 days after discovery of 2023abtv
Position of reported transient (fading) is shown by white cross-hairs
Measured Magnitude +12.15 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-04-13 02:27 UT (#1207085-89)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023acjp - CV Type Transient (discovered 2023-12-31)

AT 2023acjp (Hydra)
AT 2023acjp (Type: CV) discovered 2023-12-31.677 UT by Gaia
Alias: Gaia24abn, ASASSN-17od
Discovery magnitude 13.64 (G-Gaia Filter)
vs Historic Magnitude 16.37 +/- 1.19 (SD)
( Usual Magnitude 17.5 to 18.2 )
4.5 mag outburst in candidate CV ASASSN-17od
( TNS 2023acjp | Gaia24abn )

AT 2023acjp - 2024-01-08 (T+7.4d)
Image below (2024-01-08.033) was taken 7.4 days after discovery of 2023acjp
Position of reported transient (no longer visible) is shown by white cross-hairs
No detection, limiting magnitude +18.3 (Clear Filter)
( Adjacent star, measured mag +12.81)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-08 00:50 UT (#1180127-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023acjp - Detail 2024-01-08 (T+7.4d)
Image below (2024-01-08.033) was taken 7.4 days after discovery of 2023acjp
Position of reported transient (barely visible ?) is shown by black cross-hairs

Annotated negative CCD Image (175% size, square root scale, cropped)
5 x 60s exposure (average combine), 3x3 binning, Clear Filter
2024-01-08 00:50 UT (#1180127-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Extragalactic Transients (2023)

M31 Transients

AT 2023U - Transient (discovered 2023-01-03) in M31 (Attempt)

M31 with AT 2023U (Andromeda)
AT 2023U (Type: unk) discovered 2023-01-03.576 UT by XOSS
Alias: XM93MZ, PNV J00423797+4117130, M31N 2023-01a
Discovery Mag 18
( Rochester Latest Extragalactic Novae | TNS 2023U )

M31 with AT 2023U
Cam2 Reference Image
Position of AT 2023U is shown by blue circle
Limits of M31 Spiral Galaxy is shown by white ellipse line segments (top right corner)

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2023-01-12 02:37 UT
TS 80mm APO, ZWO ASI178MC

M31 with AT 2023U - 2023-01-10 (T+6.5d)
Image below (2023-01-10.028) was taken 6.5 days after discovery of 2023U
Reported position of transient (not visible) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-01-10 00:49 UT (#1084449-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2023U - 2023-01-12 (T+8.5d)
Image below (2023-01-12.110) was taken 8.5 days after discovery of 2023U
Reported position of transient (not visible) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-01-12 02:45 UT (#1085036-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023U (M31) on Transients 2023 Page >>

AT 2023ax - Type FeII Transient (discovered 2023-01-06) in M31 (Attempt / Unconfirmed)

M31 with AT 2023ax (Andromeda)
AT 2023ax (Type: FeII) discovered 2023-01-06.516 UT by XOSS
Alias: XM94MZ, PNV J00430924+4117022, ZTF23aaaairl
Discovery Mag 18.8 (Clear filter)
( Rochester Supernova site | TNS 2023ax )

M31 with AT 2023ax
Image taking with secondary scope showing position of reported FeII transient (blue circle)
relative to outline of M31 galaxy (white ellipse) & M31 Galaxy centre (labelled)

CMOS Image (16% size)
10s exposure (stacked), 1x1 binning
2023-02-10 23:48 UT (#Cam2_Ref)
TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2023ax(T+35.5d)
Position of reported transient is shown by white circle

Annotated CCD Image (50% size, square root scale)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-10 23:57 UT (#1096129-33)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2023ax - 2023-02-10 (T+35.5d)
Image below (2023-02-10.992) was taken 35.5 days after discovery of 2023ax
Position of reported transient (not visible) is shown by white circle

Annotated CCD Image (125% size, square root scale)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-10 23:57 UT (#1096129-33)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 2023-02a? - Candidate Nova (discovered 2023-02-07) in M31 (Attempt)

M31 with Nova M31 2023-02a? (Andromeda)
Nova M31 2023-02a? (Type: unk) discovered 2023-02-07.754 UT by Italian Supernovae Search Project
Alias: PNV J00423790+4112499
Discovery Mag 18 (R filter)
Transient appears 0.7" from the position of AT 2022abzg discovered 2022/11/01.621
by Xingming Observatory Sky Survey (XOSS). Verification of position from image superimposition
indicates that the position appears to be the same.
( Rochester Supernova site )

M31 with Nova M31 2023-02a? (T+15.3d)
Image taking with secondary scope showing position of reported transient (blue circle)
relative to outline of M31 galaxy (white ellipse) & M31 Galaxy centre (labelled)

CMOS Image (16% size)
10s exposure (stacked), 1x1 binning
2023-02-23 00:17 UT (#Cam2_Ref)
TS 80mm APO, ZWO ASI178MC & PHD2

M31 with Nova M31 2023-02a? (T+15.3d)
Position of reported transient (not visible) is shown by white circle

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-23 00:27 UT (#1101124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-02a? - 2023-02-23 (T+15.3d)
Image below (2023-02-23.013) was taken 15.3 days after discovery of M31 2023-02a?
Position of reported transient (not visible) is shown by white circle

Annotated CCD Image (100% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-23 00:27 UT (#1101124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova 2023-02a? (M31) on Transients 2023 Page >>

AT 2023brc - Transient (discovered 2023-02-13) in M31 (Attempt / Unconfirmed)

M31 with AT 2023brc (Andromeda)
AT 2023brc (Type: unk) discovered 2023-02-13.558 UT by XOSS
Alias: XM96MZ, PNV J00422147+4112452
Discovery Mag 18 (Clear filter)
( Rochester Supernova site | TNS 2023brc )

M31 with AT 2023brc
Image taking with secondary scope showing position of reported transient (blue circle)
relative to outline of M31 galaxy (white ellipse) & M31 Galaxy centre (labelled)

CMOS Image (16% size)
10s exposure (stacked), 1x1 binning
2023-02-26 20:33 UT (#Cam2_Ref)
TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2023brc (T+13.3d)
Position of reported transient is shown by white circle

Annotated CCD Image (50% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-26 20:44 UT (#1102061-65)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2023brc - 2023-02-26 (T+13.3d)
Image below (2023-02-26.858) was taken 13.3 days after discovery of 2023brc
Position of reported transient (not visible) is shown by white circle

Annotated CCD Image (100% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-26 20:44 UT (#1102061-65)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2023brc - 2023-03-10 (T+25.3d)
Image below (2023-03-10.887) was taken 25.3 days after discovery of 2023brc
Position of reported transient (not visible) is shown by white circle

Annotated CCD Image (100% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-10 21:24 UT (#1106092-95)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 2023-03a? - Candidate Nova (discovered 2023-03-27) in M31

M31 with Nova M31 2023-03a? (Andromeda)
Nova M31 2023-03a? (Type: unk) discovered 2023-03-27.793 UT by Kamil Hornoch et al.
Alias: PNV J00423893+4126379
Discovery Mag 16.6
( Rochester Extragalactic Novae | Discovery Image (Kamil Hornoch et al) )

Nova M31 2023-03a? (T+6.1d)
Image taking with secondary scope showing position of reported transient (blue circle)
relative to outline of M31 galaxy (white ellipse) & M31 Galaxy centre (labelled)

CMOS Image (16% size)
10s exposure (stacked), 1x1 binning
2023-04-02 21:31 UT (#Cam2_Ref)
TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-03a? (T+6.1d)
Position of reported transient (faint) is shown by white circle

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-02 20:43 UT (#1110015-19)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-03a? - 2023-04-02 (T+6.1d)
Image below (2023-04-02.857) was taken 6.1 days after discovery of Nova M31 2023-03a?
Position of reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-02 20:43 UT (#1110015-19)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated Negative CCD Image (100% size, square root scale, cropped)
Image details as above

Nova M31 2023-03a? - 2023-04-19 (T+22.3d)
Image below (2023-04-19.074) was taken 22.3 days after discovery of Nova M31 2023-03a?
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-19 01:53 UT (#1114110-13)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-03a? - 2023-09-30 (T+186.2d)
Image below (2023-09-30.029) was taken 186.2 days after discovery of Nova M31 2023-03a?
Position of earlier transient (not visible, probably faded/no longer visible) is shown by white cross-hairs
Poor quality image (bright moonlit sky background)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-30 00:49 UT (#1151040-44)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated Negative CCD Image (100% size, square root scale, cropped)
Image details as above

AT 2023gvz - Transient (discovered 2023-04-26) in M31

M31 with AT 2023gvz (Andromeda)
AT 2023gvz (Type: unk) discovered 2023-04-26.022 UT by MASTER
Alias: MASTER OT J004240.02+410334.1
Discovery Mag 16.9 (Clear filter) vs last non-detection, limiting mag 21.3
( TNS 2023gvz )

M31 with AT 2023gvz - 2023-09-10 (T+137.1d)
Image below (2023-09-10.098) was taken 137.1 days after discovery of 2023gvz
Position of reported transient (faded/no longer visible) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-10 02:30 UT (#1142123-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2023gvz - 2023-09-25 (T+152.9d)
Image below (2023-09-25.969) was taken 152.9 days after discovery of 2023gvz
Position of reported transient (faded/no longer visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-25 23:25 UT (#1149070-74)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with AT 2023gvz - 2023-11-15 (T+203.9d)
Image below (2023-11-15.966) was taken 203.9 days after discovery of 2023gvz
Position of reported transient (faded/no longer visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 23:14 UT (#1167205-06)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 2023-05b? - Extragalactic Nova, AT2023ksu (discovered 2023-05-28) in M31 (Attempted Observation)

M31 with Nova M31 2023-05b? (Andromeda)
Nova M31 2023-05b? (Type: unk) discovered 2023-05-28.063 UT by Kamil Hornoch et al.
Alias: PNV J00421981+4107048, AT2023ksu
Located 276".7 west and 543".7 south of the center of M31
Discovery Mag 17.59 (r-ZTF Filter)
( TNS 2023ksu | Rochester, Extragalactic Novae - 2023 )

Nova M31 2023-05b? (T+6.1d)
Image taking with secondary scope showing position of reported transient (blue circle)
relative to outline of M31 galaxy (white ellipse) & M31 Galaxy centre (labelled)

CMOS Image (16% size)
10s exposure (stacked), 1x1 binning
2023-09-04 02:27 UT (#Cam2_Ref)
TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-05b? - 2023-09-04 (T+99.0d)
Image below (2023-09-04.063) was taken 99.0 days after discovery of Nova M31 2023-05b?
Position of earlier reported transient (faded / not visible) is shown by white circle

Annotated CCD Image (70% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-04 01:39 UT (#1138144-48)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-05b? - 2023-09-07 (T+102.0d)
Image below (2023-09-07.065) was taken 102.0 days after discovery of Nova M31 2023-05b?
Position of earlier reported transient (faded / not visible) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-07 01:42 UT (#1140105-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-05b? - 2023-09-21 (T+116.9d)
Image below (2023-09-21.997) was taken 116.9 days after discovery of Nova M31 2023-05b?
Position of earlier reported transient (faded / not visible) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-22 00:04 UT (#1148082-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-05b? - 2023-11-08 (T+164.9d)
Image below (2023-11-08.936) was taken 164.9 days after discovery of Nova M31 2023-05b?
Position of earlier reported transient (faded / not visible) is shown by white circle

Annotated CCD Image (100% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 22:37 UT (#1163110-14)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-05b? - 2023-11-09 (T+165.8d)
Image below (2023-11-09.888) was taken 165.8 days after discovery of Nova M31 2023-05b?
Position of earlier reported transient (faded / not visible) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 21:23 UT (#1164077-79)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-05b? - 2023-11-11 (T+167.9d)
Image below (2023-11-11.931) was taken 167.9 days after discovery of Nova M31 2023-05b?
Position of earlier reported transient (faded / not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-11 22:29 UT (#1165082-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023trk - Extragalactic Nova (discovered 2023-09-26) in M31

Nova AT 2023trk in M31 (Andromeda)
AT 2023trk (Type: EGN) discovered 2023-09-26.461 UT by ATLAS
Alias: ATLAS23tfn, PNV J00441143+4120239
Discovery Mag 17.38 (orange-ATLAS filter)
( TNS 2023trk )

Nova M31 AT 2023trk
Cam2 Reference Image, Position of AT 2023trk (not visible in this exposure) is shown by blue circle
Limits of M31 Spiral Galaxy is shown by white ellipse
White line crossing FOV is a satellite track.

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2022-09-29 04:08 UT
TS 80mm APO, ZWO ASI178MC

Nova M31 AT 2023trk - 2023-09-29 (T+2.7d)
Image below (2023-09-29.174) was taken 2.7 days after discovery of 2023trk
Position of earlier transient (faint but distinct) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-29 04:19 UT (#1150063-67)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023trk - 2023-09-30 (T+3.6d)
Image below (2023-09-30.050) was taken 3.6 days after discovery of 2023trk
Position of reported transient (very faint) is shown by white cross-hairs
Poor quality image (bright moonlit sky background)

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-30 01:15 UT (#1151051-52)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023trk - 2023-10-03 (T+7.5d)
Image below (2023-10-03.922) was taken 7.5 days after discovery of 2023trk
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude ?
Poor quality image (single frame due to developing cloud)

Annotated CCD Image (100% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-10-03 22:08 UT (#1153052)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023trk - 2023-10-04 (T+8.5d)
Image below (2023-10-04.985) was taken 8.5 days after discovery of 2023trk
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude +17.75 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-04 23:48 UT (#1154087-91)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023trk - 2023-10-05 (T+9.5d)
Image below (2023-10-05.928) was taken 9.5 days after discovery of 2023trk
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude +18.23 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-05 22:26 UT (#1155005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023trk - 2023-10-11 (T+15.5d)
Image below (2023-10-11.917) was taken 15.5 days after discovery of 2023trk
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude ?

Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-11 22:10 UT (#1156052-56)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023trk - 2023-10-17 (T+20.7d)
Image below (2023-10-17.173) was taken 20.7 days after discovery of 2023trk
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude ?

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-17 04:17 UT (#1157018-22)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023trk - 2023-10-22 (T+26.5d)
Image below (2023-10-22.993) was taken 26.5 days after discovery of 2023trk
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude ?

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 23:58 UT (#1158154-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023trk - 2023-11-05 (T+40.4d)
Image below (2023-11-05.849) was taken 40.4 days after discovery of 2023trk
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection, Limiting Mag +18.2 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-05 20:31 UT (#1160028-32)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ttu - Transient (discovered 2023-09-29) in M31 (Attempt)

AT 2023ttu in M31 (Andromeda)
AT 2023ttu (Type: unk) discovered 2023-09-29.359 UT by Yuqing Ren, Jingyuan Zhao
Discovery Mag 16.4 (L_ filter)
( TNS 2023ttu )

AT 2023ttu in M31
Cam2 Reference Image, Position of AT 2023ttu is shown by blue circle
Limits of M31 Spiral Galaxy lie beyond image FOV

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2022-10-30 00:21 UT
TS 80mm APO, ZWO ASI178MC

AT 2023ttu in M31 - 2023-09-30 (T+0.7d)
Image below (2023-09-30.015) was taken 0.7 days after discovery of 2023ttu
Position of reported transient (not visible) is shown by white cross-hairs
A faint object lies just west and south of the reported transient coords.
Is this object the transient 2023ttu ?

Annotated CCD Image (125% size, square root scale,
unsharp masked (um4), gamma correction, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-30 00:31 UT (#1151034-38)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 2023-10a? - Extragalactic Nova (discovered 2023-10-01) in M31

Nova M31 2023-10a? (Andromeda)
Nova M31 2023-10a? (Type: unk) discovered 2023-10-01.757 UT by Gianluca Masi
Alias: PNV J00402967+4051414
Located 1522".9 west and 1467".1 south of the center of M31
Discovery Mag 17.9
The new source is not visible on Panstarrs DR1 and not visible of SDSS9, as available via Aladin.
This new source is not visible on images taken on 2023-09-24 with the same setup.
( Rochester, Extragalactic Novae - 2023 )

Nova M31 AT 2023trk
Cam2 Reference Image, Position of Nova M31 2023-10a? (not visible in this exposure) is shown by blue circle
Limits of M31 Spiral Galaxy is shown by white ellipse
Image also captures the elliptical galaxy M32 (NCC 221) on left hand side

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2022-10-03 20:39 UT (21:39 LT)
TS 80mm APO, ZWO ASI178MC

Nova M31 2023-10a? - 2023-10-03 (T+2.1d)
Image below (2023-10-03.863) was taken 2.1 days after discovery of Nova M31 2023-10a?
Position of reported nova (faint but distinct) is shown by white cross-hairs
Measured Magnitude +17.64 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-03 20:51 UT (#1153013-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-10a? - 2023-10-04 (T+3.1d)
Image below (2023-10-04.890) was taken 3.1 days after discovery of Nova M31 2023-10a?
Position of reported nova (faint, fading) is shown by white cross-hairs
Measured Magnitude +18.09 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-04 21:30 UT (#1154030-34)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-10a? - 2023-10-11 (T+10.1d)
Image below (2023-10-11.842) was taken 10.1 days after discovery of Nova M31 2023-10a?
Position of reported nova (faint, fading) is shown by white cross-hairs
Measured Magnitude +18.20 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-11 20:20 UT (#1156010-14)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-10a? - 2023-10-22 (T+21.1d)
Image below (2023-10-22.855) was taken 21.1 days after discovery of Nova M31 2023-10a?
Position of reported nova (faint, fading) is shown by white cross-hairs
Measured Magnitude +18.27 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 20:38 UT (#1158078-82)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-10a? - 2023-11-06 (T+36.1d)
Image below (2023-11-06.892) was taken 36.1 days after discovery of Nova M31 2023-10a?
Position of reported nova (very faint) is shown by white cross-hairs
Estimated Magnitude +18.1 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-06 21:34 UT (#1161015-19)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 2023-10a? - 2023-11-07 (T+37.2d)
Image below (2023-11-07.984) was taken 37.2 days after discovery of Nova M31 2023-10a?
Position of reported nova (very faint) is shown by white cross-hairs
Measured Magnitude ? (too faint)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-07 23:46 UT (#1162105-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ufj - Extragalactic Nova (discovered 2023-10-06) in M31

Nova AT 2023ufj in M31 (Andromeda)
AT 2023ufj (Type: EGN) discovered 2023-10-06.431 UT by ATLAS
Alias: ATLAS23tru, ZTF23abigaao, AT2023uyl
Discovery Mag 18.18 (orange-ATLAS filter)
Object's classification report notes prominent P Cygni profiles of
H alpha, H beta, and O I 7774
( TNS 2023ufj )

Nova M31 AT 2023trk
Cam2 Reference Image, Position of AT 2023trk (not visible in this exposure) is shown by blue circle
Limits of M31 Spiral Galaxy is shown by white ellipse

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2023-10-22 18:24 UT
TS 80mm APO, ZWO ASI178MC

Nova M31 AT 2023ufj in M31 (T+16.3d)
Position of reported nova (faint) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 18:36 UT (#1158005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023ufj - 2023-10-22 (T+16.3d)
Image below (2023-10-22.769) was taken 16.3 days after discovery of 2023ufj
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude +17.73

Nova M31 AT 2023ufj - 2023-11-06 (T+31.5d)
Image below (2023-11-06.935) was taken 31.5 days after discovery of 2023ufj
Position of reported transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +18.7 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-06 22:35 UT (#1161035-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023ufj - 2023-11-07 (T+32.4d)
Image below (2023-11-07.865) was taken 32.4 days after discovery of 2023ufj
Position of reported transient (faded & no longer visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-07 20:54 UT (#1162015-19)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023uri - Extragalactic Nova (discovered 2023-10-11) in M31

Nova M31 AT 2023uri in M31 (Andromeda)
AT 2023uri (Type: EGN) discovered 2023-10-11.592 UT by XOSS
Alias: PSP23K, PNV J00430061+4119400, M31N 2023-10d
Discovery Mag 17.57 (Clear filter)
Object's classification report notes
"It shows strong Hα, Hβ emission lines"
( TNS 2023uri )

Nova M31 AT 2023uri in M31
Cam2 Reference Image, Position of AT 2023trk (not visible in this exposure) is shown by blue circle
Limits of M31 Spiral Galaxy is shown by white ellipse

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2023-10-22 18:45 UT
TS 80mm APO, ZWO ASI178MC

Nova M31 AT 2023uri (T+11.2d)
Position of reported nova (faint) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 18:58 UT (#1158012-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023uri - 2023-10-22 (T+11.2d)
Image below (2023-10-22.784) was taken 11.2 days after discovery of 2023uri
Position of reported transient (very faint) is shown by white cross-hairs
Estimated Magnitude +16.8 (Clear Filter)

Nova M31 AT 2023uri - 2023-11-06 (T+26.3d)
Image below (2023-11-06.918) was taken 26.3 days after discovery of 2023uri
Position of reported transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +17.0 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-06 22:11 UT (#1161028-32)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023uri - 2023-11-08 (T+27.4d)
Image below (2023-11-08.000) was taken 27.4 days after discovery of 2023uri
Position of reported transient (likely faded & no longer visible) is shown by white cross-hairs
Measured Magnitude ?

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 00:09 UT (#1162112-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023veq - EGN Type Transient (discovered 2023-10-16) in M31

Nova M31 AT 2023veq (Andromeda)
AT 2023veq (Type: EGN) discovered 2023-10-16.987 UT by Robert Fidrich
Alias: Vend55, PNV J00433237+4138211, MASTER OT J004332.34+413821.4
Discovery Mag 18.6 (Clear Filter)
( TNS 2023veq )

Nova M31 AT 2023veq
Cam2 Reference Image, Position of AT 2023veq (not visible in this exposure) is shown by blue circle
Limits of M31 Spiral Galaxy is shown by white ellipse

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2023-11-01 00:14 LT
TS 80mm APO, ZWO ASI178MC

Nova M31 AT 2023veq - 2023-11-01 (T+15.0d)
Image below (2023-11-01.014) was taken 15.0 days after discovery of 2023veq
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude ? (Unable to isolate in SExtractor)

Annotated CCD Image (100% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-11-01 00:20 UT (#1159015)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023veq - 2023-12-02 (T+46.9d)
Image below (2023-12-02.922) was taken 46.9 days after discovery of 2023veq
Position of reported transient (no longer visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 22:16 UT (#1171117-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023yij - EGN Type Transient (discovered 2023-11-23) in M31

M31 with Nova AT 2023yij (Andromeda)
AT 2023yij (Type: EGN) discovered 2023-11-23.799 UT by Castellani Flavio
Alias: OMB-PNV21, PNV J00424587+4121379, Gaia23dnb
Discovery Mag 19.1 (Clear Filter)
Gaia, 2023-12-04 00:05 18.12 (T+10.2d)
Gaia, 2023-12-18 06:09 19.31 (T+24.5d)
( TNS 2023yij | Gaia23dnb)

M31 - Spiral Galaxy with Nova AT 2023yij (T+12.0d)
Cam2 Reference Image, Position of AT 2023yij (not visible in this exposure) is shown by blue circle
Limits of M31 Spiral Galaxy is shown by white ellipse

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2023-12-05 19.29 UT
TS 80mm APO, ZWO ASI178MC

Nova AT 2023ufj (T+12.0d)
Position of reported nova (barely visible) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-05 19:40 UT (#1172018-21)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023yij - 2023-12-05 (T+12.0d)
Image below (2023-12-05.815) was taken 12.0 days after discovery of 2023yij
Position of reported transient (barely visible) is shown by white cross-hairs

Nova M31 AT 2023yij - 2023-12-16 (T+22.9d)
Image below (2023-12-16.728) was taken 22.9 days after discovery of 2023yij
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-16 17:36 UT (#1173005-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated CCD Image (100% size, linear scale, cropped)
Image details as above

Nova M31 AT 2023yij - 2023-12-17 (T+24.1d)
Image below (2023-12-17.938) was taken 24.1 days after discovery of 2023yij
Position of reported transient (not visible) is shown by white cross-hairs
Non Detection, limiting magnitude +17.2 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-17 22:35 UT (#1174012-14)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023yoa - EGN Type Transient (discovered 2023-11-27) in M31

M31 with Nova M31 AT 2023yoa (Andromeda)
AT 2023yoa (Type: EGN) discovered 2023-11-27.831 UT by XOSS
Alias: PSP23N, PNV J00430932+4115416, Nova M31 2023-11f
Discovery Mag 16.2 (Clear filter)
( TNS 2023yoa )

Nova M31 AT 2023yoa
Cam2 Reference Image, Position of AT 2023yoa (not visible in this exposure) is shown by blue circle
Limits of M31 Spiral Galaxy is shown by pale blue/white ellipse

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2023-11-30 19:53 UT
TS 80mm APO, ZWO ASI178MC

Nova M31 AT 2023yoa (T+3.0d)
Image below (2023-09-29.174) was taken 2.7 days after discovery of 2023trk
Position of reported EGN transient (very faint) is shown by white circle

Annotated CCD Image (50% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-30 20:04 UT (#1169041-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023yoa - 2023-11-30 (T+3.0d)
Image below (2023-11-30.831) was taken 3.0 days after discovery of 2023yoa
Position of reported transient (very faint) is shown by white cross-hairs
Estimated Magnitude +16.5* (Clear Filter) * uncertain estimate

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-30 20:04 UT (#1169041-45)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023yqt - EGN Type Transient (discovered 2023-12-03) in M31

M31 with Nova AT 2023yqt (Andromeda)
AT 2023yqt (Type: EGN) discovered 2023-12-03.515 UT by XOSS
Alias: PSP23Q, PNV J00422755+4111086, Gaia23dmh
Discovery Mag 16.22 (Clear Filter)
Gaia, 2023-12-04 00:05 16.42 (T+0.5d)
Gaia, 2023-12-18 01:55 19.66 (T+14.6d)
( TNS 2023yqt | Gaia23dmh)

M31 - Spiral Galaxy with Nova AT 2023yqt (T+2.5d)
Cam2 Reference Image, Position of AT 2023yij (not visible in this exposure) is shown by blue circle
Limits of M31 Spiral Galaxy is shown by white ellipse (corners only)

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2023-12-05 19.29 UT
TS 80mm APO, ZWO ASI178MC

Nova AT 2023yqt (T+2.5d)
Position of reported nova (faint) is shown by white circle

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-05 23:54 UT (#1172103-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023yqt - 2023-12-05 (T+2.5d)
Image below (2023-12-05.990) was taken 2.5 days after discovery of 2023yqt
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +16.72 (Clear Filter)

Annotated CCD Image (100% size, liner scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-05 23:54 UT (#1172103-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M31 AT 2023yqt - 2023-12-16 (T+13.2d)
Image below (2023-12-16.755) was taken 13.2 days after discovery of 2023yqt
Position of reported transient (faded & no longer visible) is shown by white cross-hairs
Non-Detection, limiting magnitude +17.5 (Clear Filter)

Annotated CCD Image (100% size, liner scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-16 18:12 UT (#1173021-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 Transients (2023)

AT 2023bne - EGN Type Transient (discovered 2023-02-10) in M33

M33 with Nova M33 AT 2023bne (Triangulum)
AT 2023bne (Type: EGN) discovered 2023-02-10.791 UT by Italian Supernovae Search Project
Alias: OMB-PNV19, PNV J01345297+3047145
Discovery Magnitude 17.5 (Clear Filter)
( TNS 2023bne )

M33 with Nova M33 AT 2023bne
Image taking with secondary scope showing position of reported EGN (blue circle)
relative to M33 Galaxy centre (labelled) and outline of M33 (white ellipse)

CMOS Image (16% size)
10s exposure (stacked), 1x1 binning
2023-02-21 21:05 UT (#Cam2_Ref)
TS 80mm APO, ZWO ASI178MC & PHD2

Nova M33 AT 2023bne (T+2.2d)
Position of reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-12 23:03 UT (#1097108-12)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M33 AT 2023bne - 2023-02-12 (T+2.2d)
Image below (2023-02-12.955) was taken 2.2 days after discovery of 2023bne
Position of reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-12 23:03 UT (#1097108-12)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated Negative CCD Image (125% size, square root scale, cropped)
Image details as above

Nova M33 AT 2023bne - 2023-02-21 (T+11.1d)
Image below (2023-02-21.881) was taken 11.1 days after discovery of 2023bne
Position of reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-21 21:17 UT (#1100044-48)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated Negative CCD Image (125% size, square root scale, cropped)
Image details as above

AT 2023nou - Transient (discovered 2023-07-20) in M33

M33 with AT 2023nou (Triangulum)
AT 2023nou (Type: unk) discovered 2023-07-20.435 UT by GEOTS
Alias: GEOTS-Balaji-2023-008, PNV J01335643+3043357
Discovery Magnitude 16.7 (Clear Filter)
Possible Nova in M33
( TNS 2023nou )

M33 with AT 2023nou
Cam2 Reference Image, Position of AT 2023nou is shown by blue circle
Limits of M33 Spiral Galaxy is shown by white ellipse

Annotated CMOS Image (16% size)
(10s exposure, 1x1 binning)
2023-07-31 01:50 UT (02:50 LT)
TS 80mm APO, ZWO ASI178MC

M33 with AT 2023nou - 2023-07-31 (T+10.6d)
Image below (2023-07-31.078) was taken 10.6 days after discovery of 2023nou
Position of reported transient (faint) is shown by white circle

Annotated CCD Image (50% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-07-31 02:00 UT (#1124120-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-07-31 (T+10.6d)
Image below (2023-07-31.078) was taken 10.6 days after discovery of 2023nou
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +16.98

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-07-31 02:00 UT (#1124120-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-08-09 (T+19.7d)
Image below (2023-08-09.100) was taken 19.7 days after discovery of 2023nou
Position of reported transient (faint) is shown by white cross-hairs
Poor quality image (passing cloud/poor sky transparency, single frame)

Annotated CCD Image (125% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-08-09 02:24 UT (#1127121)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-08-20 (T+30.6d)
Image below (2023-08-20.085) was taken 30.6 days after discovery of 2023nou
Position of reported transient (faint but distinct) is shown by white cross-hairs
Measured Magnitude +16.89

Annotated CCD Image (125% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-08-20 02:07 UT (#1131154-56)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-08-21 (T+31.6d)
Image below (2023-08-21.024) was taken 31.6 days after discovery of 2023nou
Position of reported transient (faint but distinct) is shown by whiIte cross-hairs
Measured Magnitude +16.62

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-08-21 00:48 UT (#1132108-12)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-08-22 (T+32.6d)
Image below (2023-08-22.035) was taken 32.6 days after discovery of 2023nou
Position of reported transient (faint) is shown by whiIte cross-hairs
Measured Magnitude +16.82

Annotated CCD Image (125% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-08-22 00:56 UT (#1133050-52)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-08-31 (T+41.6d)
Image below (2023-08-31.044) was taken 41.6 days after discovery of 2023nou
Position of reported transient (faint & fading) is shown by whiIte cross-hairs
Measured Magnitude +17.05

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-08-31 01:10 UT (#1135117-20)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-09-04 (T+45.7d)
Image below (2023-09-04.097) was taken 45.7 days after discovery of 2023nou
Position of reported transient (faint & stable?) is shown by white cross-hairs
Measured Magnitude +17.03

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-04 02:27 UT (#1138170-74)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-09-07 (T+48.7d)
Image below (2023-09-07.126) was taken 48.7 days after discovery of 2023nou
Position of reported transient (faint & fading) is shown by white cross-hairs
Measured Magnitude +16.84

Annotated CCD Image (125% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-07 03:07 UT (#1140140-42)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-09-18 (T+60.5d)
Image below (2023-09-18.926) was taken 60.5 days after discovery of 2023nou
Position of reported transient (faint & slightly brightening?) is shown by whiIte cross-hairs
Measured Magnitude +16.90

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-18 22:23 UT (#1146056-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-10-03 (T+75.4d)
Image below (2023-10-03.878) was taken 75.4 days after discovery of 2023nou
Position of reported transient (very faint & fading) is shown by whiIte cross-hairs
Measured Magnitude ?

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-03 21:13 UT (#1153020-24)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-10-05 (T+76.6d)
Image below (2023-10-05.024) was taken 76.6 days after discovery of 2023nou
Position of reported transient (very faint & fading) is shown by whiIte cross-hairs
Measured Magnitude +16.83 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-05 00:42 UT (#1154117-20)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-10-05 (T+77.5d)
Image below (2023-10-05.944) was taken 77.5 days after discovery of 2023nou
Position of reported transient (very faint & fading) is shown by whiIte cross-hairs
Measured Magnitude +17.07 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-05 22:49 UT (#1155011-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-10-11 (T+83.5d)
Image below (2023-10-11.933) was taken 83.5 days after discovery of 2023nou
Position of reported transient (very faint & fading) is shown by whiIte cross-hairs
Measured Magnitude +16.96 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-11 22:32 UT (#1156059-63)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-10-22 (T+94.4d)
Image below (2023-10-22.869) was taken 94.4 days after discovery of 2023nou
Position of reported transient (very faint & fading slowly) is shown by whiIte cross-hairs
Measured Magnitude +16.97 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-22 21:01 UT (#1158084-88)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-11-07 (T+110.5d)
Image below (2023-11-07.949) was taken 110.5 days after discovery of 2023nou
Position of reported transient (very faint) is shown by whiIte cross-hairs
Measured Magnitude +16.95 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-07 22:56 UT (#1162080-84)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2024-01-06 (T+170.4d)
Image below (2024-01-06.851) was taken 170.4 days after discovery of 2023nou
Position of reported transient (very faint) is shown by whiIte cross-hairs
Measured Magnitude +16.91 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-06 20:34 UT (#1179079-83)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with AT 2023nou - 2023-12-01 (T+134.4d)
Image below (2023-12-01.821) was taken 134.4 days after discovery of 2023nou
Position of reported transient (very faint) is shown by whiIte cross-hairs
Measured Magnitude +17.07(Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-01 19:50 UT (#1170060-64)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023nou - Reference Image
Position of reported transient is shown by mauve cross-hairs
Object appears to be a previously known star visible in DSS2 Colour image

DSS2 Image captured in Aladin

M33 2023-11a? - Unconfirmed Nova (discovered 2023-11-05) in M33 (attempted observation)

M33 with Nova M33 2023-11a? (Triangulum)
Nova M33 2023-11a? (Type: unconf) discovered 2023-11-05.969 UT by unknown
Alias: PNV J01342140+3023266
Discovery Mag ?
( Rochester, Extragalactic Novae - 2023 )

Nova M33 2023-11a? - 2023-11-08 (T+2.9d)
Image below (2023-11-08.848) was taken 2.9 days after discovery of Nova M33 2023-11a?
Position of reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-08 20:30 UT (#1163050-54)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M33 2023-11a? - 2023-11-09 (T+4.0d)
Image below (2023-11-09.941) was taken 4.0 days after discovery of Nova M33 2023-11a?
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 22:38 UT (#1164103-04)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M33 2023-11a? - 2023-11-12 (T+6.1d)
Image below (2023-11-12.077) was taken 6.1 days after discovery of Nova M33 2023-11a?
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-12 02:00 UT (#1165166-70)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M33 2023-11a? - 2023-11-15 (T+9.9d)
Image below (2023-11-15.910) was taken 9.9 days after discovery of Nova M33 2023-11a?
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection Limiting Magnitude +19.0 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 21:59 UT (#1167169-73)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023ypg - EGN Type Transient (discovered 2023-11-29) in M33

M33 with Nova M33 AT 2023ypg (Triangulum)
AT 2023ypg (Type: EGN) discovered 2023-11-29.609 UT by XOSS
Alias: PSP23O, PNV J01325400+3021387, Gaia23dnw
Discovery Magnitude 18.2 (Clear filter)
Confirmed Nova
Gaia, 2023-12-06 23:55, Mag +18.59
Gaia, 2023-12-07 07:42 , Mag +18.71
Gaia, 2023-12-12 05:59 , Mag +18.42
Gaia, 2024-01-20 18:52, Mag +19.50
( TNS 2023ypg | Gaia23dnw )

M33 with Nova AT 2023ypg
Image taking with secondary scope showing position of reported EGN (blue circle)
relative to M33 Galaxy centre (labelled) and outline of M33 (white ellipse)

CMOS Image (16% size)
10s exposure (stacked), 1x1 binning
2023-12-19 19:21 UT (#Cam2_Ref)
TS 80mm APO, ZWO ASI178MC & PHD2

M33 with Nova AT 2023ypg (T+20.2d)

Annotated CCD Image (50% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 19:33 UT (#1176021-24)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova M33 AT 2023ypg - 2023-11-30 (T+1.4d)
Image below (2023-11-30.962) was taken 1.4 days after discovery of 2023ypg
Position of reported Transient (very faint) is indicated by white cross-hairs.
Poor quality image (light ghosts from preceeding target (Jupiter)
Measured Magnitude + 17.97* (Clear Filter) * somewhat uncertain

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-30 23:09 UT (#1169153-54)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M33 with Nova AT 2023ypg - 2023-12-19 (T+20.2d)
Image below (2023-12-19.809) was taken 20.2 days after discovery of 2023ypg
Position of reported Transient (faint) is indicated by white cross-hairs.
Measured Magnitude +18.57 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 19:33 UT (#1176021-24)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023ypg (in M33) on Transients 2023 Page >>

Other Extragalactic Transients (2023)

AT 2023by - Transient (discovered 2023-01-07) in IC 1501

IC 1501 with AT 2023by (Pisces)
AT 2023by (Type: unk) discovered 2023-01-07.158 UT by ZTF
Alias: ZTF23aaaakig
Discovery magnitude 18.28 (r-ZTF Filter)
( Previous Non-Detection, Limiting Mag 19.2 )
( TNS 2023by )

IC 1501 - Spiral Galaxy
IC 1501 (catalog mag +14.5)

Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-12 18:43 UT (#1181039-43)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 1501 with AT 2023by - 2024-01-12 (T+370.6d)
Image below (2024-01-12.775) was taken 370.6 days after discovery of 2023by
Position of earlier SN (faded & no longer visible) is shown by white cross-hairs
Non Detection, Limiting Magnitude +19.2 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-12 18:43 UT (#1181039-43)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023by (in IC 1501) on Transients 2023 Page >>

AT 2023aov - Transient (discovered 2023-01-25) in IC 1525 (Attempt)

IC 1525 with AT 2023aov (Andromeda)
AT 2023aov (Type: unk) discovered 2023-01-25.125 UT by ZTF
Alias: ZTF23aaaznjk
Discovery Mag 18.14 (r-ZTF Filter)
( TNS 2023aov )

IC 1525 - Spiral Galaxy with AT 2023aov (T+19.8d)
with adjacent galaxies PGC 73195 (catalog mag +15.1)
& PGC 215023 (catalog mag +16.1)

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-01-28 20:08 UT (#1093063-67)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 1525 - Earlier Image (2011)

CCD Image (200% size, cropped, linear scale)
7 x 90 sec exposure (average combine), 3x3 binning, C Filter
2011-01-29 19:28 h UT (#451035-41)
12" LX200R (at f/9.7) + ST-10XME

IC 1525 with AT 2023aov - 2023-01-26 (T+1.9d)
Image below (2023-01-26.982) was taken 1.9 days after discovery of 2023aov
Position of reported transient (not visible) is shown by white cross-hairs
Poor quality image (poor transparency due to condensation inside LX200)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-01-26 23:39 UT (#1091036-38)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 1525 with AT 2023aov - 2023-01-28 (T+3.7d)
Image below (2023-01-28.833) was taken 3.7 days after discovery of 2023aov
Position of reported transient (very faint / not visible) is shown by white cross-hairs
Poor quality image (poor transparency due to condensation inside LX200)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-01-28 20:08 UT (#1093063-67)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 1525 with AT 2023aov - 2023-02-13 (T+19.8d)
Image below (2023-02-13.971) was taken 19.8 days after discovery of 2023aov
Position of reported transient (very faint) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
4 x 60s exposure (average combine), 3x3 binning, Clear Filter
2023-01-28 18:47 UT (#1093012-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 1525 with AT 2023aov - 2023-02-19 (T+25.1d)
Image below (2023-02-19.226) was taken 25.1 days after discovery of 2023aov
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-19 05:31 UT (#1099084-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023apy - Transient (discovered 2023-01-12) in NGC 5433

NGC 5433 with AT 2023apy (Canes Venatici)
AT 2023apy (Type: unk) discovered 2023-01-12.510 UT by ZTF
Alias: ZTF19acaabsr
Discovery magnitude 17.27 (r-ZTF Filter)
( TNS 2023apy)

NGC 5433 - Spiral Galaxy
Other galaxies in FOV :
PGC 50000 (catalog mag +15.6),
PGC 49961 (catalog mag +15.8),
PGC 1997415 (catalog mag +17.0)

Annotated CCD Image (50% size, square root scale)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-13 05:13 UT (#1184179-80)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5433 with AT 2023apy - 2024-02-13 (T+396.7d)
Image below (2024-02-13.215) was taken 396.7 days after discovery of 2023apy
Position of reported transient (falikely faded, not separableis shown by white cross-hairsrs
Measured Magnitude, nucleus 14.31 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-13 05:13 UT (#1184179-80)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023axn - Transient (discovered 2023-01-27) in NGC 4666

NGC 4666 with AT 2023axn (Virgo)
AT 2023axn (Type: unk) discovered 2023-01-27.396 UT by ZTF
Alias: ZTF23aabknao
Discovery Mag 18.33 (g-ZTF Filter)
( Rochester Supernova site | TNS 2023axn )

NGC 4666 - Spiral Galaxy
with adjacent galaxies
NGC 4668 (catalog mag +13.6), PGC 1143502 (catalog +16.3)

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-14 03:47 UT (#1098188-92)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4666 - Spiral Galaxy, Detail

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-14 03:47 UT (#1098188-92)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4666 with AT 2023axn - 2023-02-13 (T+16.8d)
Image below (2023-02-13.233) was taken 16.8 days after discovery of 2023axn
Position of reported transient (not separately distinguishable) is shown by white cross-hairs
Measured magnitude +13.00 (nucleus + transient)

Annotated CCD Image (125% size, log scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-13 05:44 UT (#1097273-77)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4666 with AT 2023axn - 2023-02-14 (T+17.8d)
Image below (2023-02-14.151) was taken 17.8 days after discovery of 2023axn
Position of reported transient (not separately distinguishable) is shown by white cross-hairs
Measured magnitude +12.82 (nucleus + transient)

Annotated CCD Image (125% size, log scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-02-14 03:47 UT (#1098188-92)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cik - Transient (discovered 2023-02-16) in SDSS Galaxy

AT 2023cik (Cetus)
Alias: In SDSS J025057.46+002209.8
AT 2023cik (Type: unk) discovered 2023-02-16.133 UT by ZTF
Alias: ZTF22abzhelv, Gaia23awh
Discovery Mag 17.43 (g-ZTF Filter) vs Prior Non-Detection 18.88 limiting mag
Gaia : Alerting Magnitude 16.69 vs Historic Magnitude 17.55 +/- 0.04 SD
Brightening near the centre of galaxy WISEA J025057.46+002209.7
Gaia: 2023-01-05 23:12   17.56 (normal)
Gaia: 2023-02-01 15:09   17.62 (normal)
Gaia: 2023-02-25 08:58   16.69 (transient)
Gaia: 2023-07-18 12:09 17.51 (normal)
( TNS 2023cik | Gaia23awh )

AT 2023cik - 2024-01-13 (T+331.7d)
Image below (2024-01-13.871) was taken 331.7 days after discovery of 2023cik
Position of earlier transient (likely faded & no longer visble) is shown by white cross-hairs
Non Detection, limiting magnitude +18.5 (Clear Filter)

SDSS Host Galaxy (alias PGC 1164187, catalog mag + 17.4)
PGC 1164122 (catalog mag +16.9)

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-13 20:57 UT (#1182014-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023cik (in SDSS Galaxy) on Transients 2023 Page >>

AT 2023clc - Type MP Transient (discovered 2023-02-22) in CGCG 217-021 (Attempt)

CGCG 217-021 with AT 2023clc (Canes Venatici)
AT 2023clc (Type: MP) discovered 2023-02-22.276 UT by ATLAS
Alias: ATLAS23cmd
Discovery Magnitude 15.25 (G-Gaia Filter)
vs Historic Magnitude 15.03 +/- 0.02 SD
Gaia source fades by 0.2 mag
TNS discovery report on TNS says
Prior Non-Detection Limiting Mag 21.5 (2024-01-25 17:32)
but Gaia data for the same date gives mag 15.26)
( TNS 2024dsj )

CGCG 217-021 / PGC 46002 - Spiral Galaxy
Alias : LEDA 46002

Annotated CCD Image (50% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-28 03:40 UT (#1201095-98)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

CGCG 217-021 with AT 2023clc - 2024-03-28 (T+399.9d)
Image below (2024-03-28.148) was taken 399.9 days after discovery of 2023clc
Position of earlier transient (likely faded & no longer visible) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-28 03:40 UT (#1201095-98)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

CGCG 217-021 with AT 2023clc - 2024-02-23 (T+365.8d)
Image below (2024-02-23.065) was taken 365.8 days after discovery of 2023clc
Position of earlier transient (likely faded & no longer visible) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 01:42 UT (#1189195-99)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023clx - Type TDE Transient (discovered 2023-02-22) in NGC 3799

NGC 3799 with AT 2023clx (Leo)
AT 2023clx (Type: TDE) discovered 2023-02-22.210 UT by ASAS-SN
Alias: ASASSN-23bd
Discovery Magnitude 16.3 (g-Sloan Filter)
Spectral features are very similar to a sample of previously-identified
TDEs (e.g., AT 2018hyz = ASASSN-18zj).
( TNS 2023clx )

NGC 3799 - Spiral Galaxy with AT 2023clx (T+20.8d)

Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-14 23:34 UT (#1107077-81)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3799 with AT 2023clx - 2023-03-14 (T+20.8d)
Image below (2023-03-14.975) was taken 20.8 days after discovery of 2023clx
Position of reported transient (not separately distinguishable) is shown by white cross-hairs
Measured magnitude +14.00 (nucleus + TDE transient)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-14 23:34 UT (#1107077-81)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3799 with AT 2023clx - 2023-03-27 (T+33.7d)
Image below (2023-03-27.892) was taken 33.7 days after discovery of 2023clx
Position of reported transient (not separately distinguishable) is shown by white cross-hairs
Measured magnitude +13.79 (nucleus + TDE transient)

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-03-27 21:34 UT (#1108051-55)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3799 with AT 2023clx - 2023-04-10 (T+47.7d)
Image below (2023-04-10.941) was taken 47.7 days after discovery of 2023clx
Position of reported transient (not separately distinguishable) is shown by white cross-hairs
Measured magnitude +13.95 (nucleus + TDE transient)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-10 22:44 UT (#1111028-32)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3799 with AT 2023clx - 2023-04-14 (T+51.8d)
Image below (2023-04-14.966) was taken 51.8 days after discovery of 2023clx
Position of reported transient (not separately distinguishable) is shown by white cross-hairs
Measured magnitude +13.84 (nucleus + TDE transient)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-14 23:16 UT (#1112052-54)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023cpp - Transient (discovered 2023-02-17) in NGC 4900

NGC 4900 with AT 2023cpp (Virgo)
AT 2023cpp (Type: unk) discovered 2023-02-17.383 UT by ZTF
Alias: ZTF19adctrvg
Discovery Magnitude ? (r-ZTF Filter)
( TNS 2023cpp )

NGC 4900 / Herschel I-143 - Spiral Galaxy
[ Herschel 400 Objects ]

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-04-13 23:20 UT (#1208012-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4900 with AT 2023cpp - 2024-04-13 (T+421.6d)
Image below (2024-04-13.966) was taken 421.6 days after discovery of 2023cpp
Position of earlier transient (not separately recognisable, likely faded)
is shown by white cross-hairs

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-04-13 23:20 UT (#1208012-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

PSN J11283070+5833456 - Transient (discovered 2023-03-29) in NGC 3690

NGC 3690 with PSN J11283070+5833456 (Ursa Major)
PSN J11283070+5833456 (Type: unk) discovered 2023-03-29.819 UT by XOSS
( Rochester Supernova site )

NGC 3690 - Spiral Galaxy
Part of ARP 299 & ARP 296
[ ARP Galaxies ]

Annotated CCD Image (50% size, log scale)
4 x 180s exposure (average combine), 3x3 binning, C Filter
2022-04-18 22:16 UT (#1000029-33)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3690 with PSN J11283070+5833456 - 2023-04-03 (T+4.2d)
Image below (2023-04-03.033) was taken 4.2 days after discovery of PSN J11283070+5833456
Position of SN (indistinguishable) is shown by white cross-hairs

Annotated CCD Image (150% size, log scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-03 00:55 UT (#1110124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3690 with PSN J11283070+5833456 - 2023-04-14 (T+16.2d)
Image below (2023-04-14.976) was taken 16.2 days after discovery of PSN J11283070+5833456
Position of SN (indistinguishable) is shown by white cross-hairs

Annotated CCD Image (150% size, log scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-04-14 23:34 UT (#1112057-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3690 - Earlier Image (2014)

CCD Image (Log Scaled, 150% size, cropped)
5 x 90s sec exposure (average combine), 3x3 binning, C Filter
2014-12-04 01:35 h UT (#574426-30)
12" LX200R (at f/10.4) + ST-10XME

AT 2023ews - Transient (discovered 2023-04-09) in UGC 4417

UGC 4417 with AT 2023ews (Lynx)
AT 2023ews (Type: unk) discovered 2023-04-09.178 UT by ALeRCE
Alias: ZTF23aaelanp
Discovery Magnitude 17.96 (orange-ATLAS Filter)
( TNS 2023ews )

UGC 4417 - Galaxy
UGC 4417 (alias PGC 23750, catalog mag +15.2)
with adjacent galaxies
PGC 2510210 (catalog mag +16.6),
PGC 2511744 (catalog mag +17.6) & PGC 2512583 (catalog mag +17.9)

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-10 02:45 UT (#1164178-82)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 4417 with AT 2023ews - 2023-11-10 (T+214.9d)
Image below (2023-11-10.108) was taken 214.9 days after discovery of 2023ews
Position of earlier reported transient (not distinguishable) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-10 02:45 UT (#1164178-82)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 4417 with AT 2023ews - Detail, 2023-11-10 (T+214.9d)
Image below (2023-11-10.108) was taken 214.9 days after discovery of 2023ews
Position of earlier reported transient (not distinguishable) is shown by white cross-hairs

Annotated CCD Image (175% size, log scale, cropped)
Image details as above

AT 2023exk - Transient (discovered 2023-04-10) in NGC 1752

NGC 1752 with AT 2023exk (Eridanus)
AT 2023exk (Type: unk) discovered 2023-04-10.008 UT by ATLAS
Alias: ATLAS23hjo
Discovery Magnitude 17.77 (orange-ATLAS filter)
( TNS 2023exk )

NGC 1752 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 01:59 UT (#1175110-12)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1752 with AT 2023exk - 2023-12-19 (T+253.1d)
Image below (2023-12-19.079) was taken 253.1 days after discovery of 2023exk
Position of earlier tranisent (no longer visible) is indicated by white cross-hairs.

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 01:59 UT (#1175110-12)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1752 with AT 2023exk - 2024-02-22 (T+318.8d)
Image below (2024-02-22.851) was taken 318.8 days after discovery of 2023exk
Position of earlier tranisent (no longer visible) is indicated by white cross-hairs.

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-22 20:34 UT (#1189033-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023iez - Transient (discovered 2023-05-13) in LEDA 1311625

LEDA 1311625 with AT 2023iez (Virgo)
AT 2023iez (Type: unk) discovered 2023-05-13.310 UT by ZTF
Alias: ZTF23aajjayv, TCP J13070070+0659214
Discovery Magnitude 16.55 (r-ZTF filter)
( TNS 2023iez )

LEDA 1311625 - Galaxy
LEDA 1311625 (alias PGC 1311625, catalog mag +17.1)
PGC 1312597 (catalog +16.2), PGC 1313190 (catalog mag +17.4),
PGC 1312996 (catalog mag +17.7), PGC 1312609 (catalog mag +18.6)

Annotated CCD Image (50% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 04:46 UT (#1175180-84)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

LEDA 1311625 with AT 2023iez - 2023-12-19 (T+219.9d)
Image below (2023-12-19.192) was taken 219.9 days after discovery of 2023iez
Position of earlier tranisent (no longer visible) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 04:46 UT (#1175180-84)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023jpp - Transient (discovered 2023-05-28) in NGC 513 (Attempt)

NGC 513 with AT 2023jpp (Andromeda)
AT 2023jpp (Type: unk) discovered 2023-05-28.474 UT by ZTF
Alias: ZTF23aamgeom
Discovery Magnitude 17.57 (r-ZTF Filter)
( TNS 2023jpp )

NGC 513 with adjacent galaxies
NGC 513 (alias PGC 5174, catalog mag +13.4),
PGC 5134 (catalog mag +15.6),
PGC 212749 (catalog mag +16.9), PGC 212747 (catalog mag ?)

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-07-31 01:41 UT (#1124113-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 513 with AT 2023jpp - 2023-07-31 (T+63.6d)
Image below (2023-07-31.064) was taken 63.6 days after discovery of 2023jpp
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-07-31 01:41 UT (#1124113-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 513 with AT 2023jpp - 2023-08-16 (T+80.5d)
Image below (2023-08-16.999) was taken 80.5 days after discovery of 2023jpp
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-08-17 00:06 UT (#1130074-78)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023mlt - Transient (discovered 2023-07-06) in NGC 5297 (Unconfirmed)

NGC 5297 with AT 2023mlt (Canes Venatici)
AT 2023mlt (Type: unconf) discovered 2023-07-06.821 UT by Mohammad Odeh
Discovery Magnitude 11.8 ( I-Cousins Filter)
vs Last Non Detection 16.5 limiting mag
TNS note "This is not a real object. Please ignore"
( TNS 2023mlt | Gaia23bay)

NGC 5297 - Spiral Galaxy
with adjacent small galaxy NGC 5296

Annotated CCD Image (50% size, square root scale)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-08-08 22:16 UT (#1127005-06)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5297 with AT 2023mlt - 2023-08-08 (T+33.1d)
Image below (2023-08-08.926) was taken 33.1 days after discovery of 2023mlt
Position of reported transient (not visible ?) is indicated by white cross-hairs.
This is adjacent to mag 9.5 star SAO 44745 (GSC 3032:258)

TNS Report ofr AT 2023mlt shows "This is not a real object. Please ignore"

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-08-08 22:16 UT (#1127005-06)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5297 with AT 2023mlt - 2023-08-13 (T+38.1d)
Image below (2023-08-13.938) was taken 38.1 days after discovery of 2023mlt
Position of reported transient (not visible ?) is indicated by white cross-hairs.
This is adjacent to mag 9.5 star SAO 44745 (GSC 3032:258)

TNS Report for AT 2023mlt shows "This is not a real object. Please ignore"

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-08-13 22:40 UT (#1128007-11)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023nbs - Transient (discovered 2023-07-13) in CGCG 420-018

CGCG 420-018 with AT 2023nbs (Orion)
AT 2023nbs (Type: unk) discovered 2023-07-13.410 UT by ASAS-SN
Alias: ASASSN-23fi
Discovery magnitude 16.18 (G-Gaia Filter)
( TNS 2023nbs )

CGCG 420-018 - Galaxy
CGCG 420-018 (Alias: PGC 16291, catalog mag +14.8)

Annotated CCD Image (50% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 23:20 UT (#1171148-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

CGCG 420-018 with AT 2023nbs - 2023-12-02 (T+142.6d)
Image below (2023-12-02.967) was taken 142.6 days after discovery of 2023nbs
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 23:20 UT (#1171148-51)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023nbs (in CGCG 420-018) on Transients 2023 Page >>

AT 2023och - Unconfirmed Transient (discovered 2023-07-26) in NGC 1461 (Unconfirmed)

NGC 1461 with AT 2023och (Eridanus)
AT 2023och (Type: unconf) discovered 2023-07-26.789 UT by Seiichiro Naito
Discovery Magnitude 18.21 (g-ZTF Filter)
( TNS 2023och )

NGC 1461 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-13 04:02 UT (#1143200-02)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1461 with AT 2023och - 2023-09-05 (T+40.4d)
Image below (2023-09-05.148) was taken 40.4 days after discovery of 2023och
Position of reported transient (not visible) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-05 03:42 UT (#1139213-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1461 with AT 2023och - 2023-09-07 (T+42.4d)
Image below (2023-09-07.151) was taken 42.4 days after discovery of 2023och
Position of reported transient (not visible) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-07 03:45 UT (#1140165-68)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1461 with AT 2023och - 2023-09-13 (T+48.4d)
Image below (2023-09-13.165) was taken 48.4 days after discovery of 2023och
Position of reported transient (not visible) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-13 04:02 UT (#1143200-02)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1461 with AT 2023och - 2023-09-19 (T+54.3d)
Image below (2023-09-19.133) was taken 54.3 days after discovery of 2023och
Position of reported transient (not visible) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-19 03:18 UT (#1146154-56)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1461 with AT 2023och - 2023-09-22 (T+57.3d)
Image below (2023-09-22.083) was taken 57.3 days after discovery of 2023och
Position of reported transient (not visible) is indicated by white cross-hairs.

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-22 02:08 UT (#1148121-25)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023pow - Unconfirmed Transient (discovered 2023-08-15) in NGC 1640

NGC 1640 with AT 2023pow (Eridanus)
AT 2023pow (Type: unconf) discovered 2023-08-15.786 UT by Masayuki Iwamoto
Discovery Mag 15.2 (Clear Filter)
( TNS 2023pow )

NGC 1640 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-02 04:01 UT (#1152072-76)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1640 with AT 2023pow - 2023-10-02 (T+47.4d)
Image below (2023-10-02.161) was taken 47.4 days after discovery of 2023pow
Position of reported transient (not visible) is shown by white cross-hairs

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-02 04:01 UT (#1152072-76)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023qoo - Afterglow Type Transient (discovered 2023-08-18) from GRB 230818A (attempted observation)

AT 2023qoo (Lyra)
AT 2023qoo (Type: Afterglow) discovered 2023-08-18.978 UT by MASTER
Alias: MASTER OT J190333.13+405348.9, GRB 230818A
Discovery Magnitude 16.2 (Clear Filter)
( TNS 2023qoo | GRB 230818A)
Optical counterpart / Afterglow to GRB 230818A
GRB Trigger (T0) at 2023-08-18 23:27:34 UTC
(Swift Trigger =1186032 (BAT) )

AT 2023qoo - 2023-08-30 (T+11.9d)
Image below (2023-08-30.898) was taken 11.9 days after discovery of 2023qoo
Position of reported transient (not visible) is shown by whiIte circle
Poor quality image (single frame only due to cloud, bright sky background)

Annotated CCD Image (100% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-08-30 21:33 UT (#1135014)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated CCD Image (175% size, square root scale, cropped)
Image details as above

AT 2023qoo - 2023-08-31 (T+13.0d)
Image below (2023-08-31.938) was taken 13.0 days after discovery of 2023qoo
Position of reported transient (not visible) is shown by whiIte cross-hairs

Annotated CCD Image (175% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-08-31 22:38 UT (#1136063-66)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023qoo - 2023-09-04 (T+17.0d)
Image below (2023-09-04.929) was taken 17.0 days after discovery of 2023qoo
Position of reported transient (not visible) is shown by whiIte cross-hairs

Annotated CCD Image (175% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-04 22:26 UT (#1139054-58)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023qzg - Transient (discovered 2023-08-28) in UGC 8927 (Attempt)

UGC 8927 with AT 2023qzg (Bootes)
AT 2023qzg (Type: unk) discovered 2023-08-28.719 UT by ATLAS
Alias: ATLAS23rtj, Gaia23cgg
Discovery Mag 17.50 (ornage-ATLAS filter)
Candidate SN (not confirmed) near galaxy UGC 8927
Gaia: 2023-09-05 02:56 17.67
Gaia: 2023-11-30 03:45 20.32
Gaia: 2023-12-04 09:50 20.32
( TNS 2023qzg | Gaia23cgg )

UGC 8927 - Spiral Galaxy
UGC 8927 (alias PGC 49913 , catalog mag +15.6)

Annotated CCD Image (50% size, square root scale)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-01-13 04:10 UT (#1181133)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 8927 with AT 2023qzg - 2023-12-02 (T+95.5d)
Image below (2023-12-02.269) was taken 95.5 days after discovery of 2023qzg
Position of earlier transient (not visible, faded) is shown by white cross-hairs
Non Detection, limiting magnitude +18.5 (Clear Filter)
(Gaia reports mag +20.32 on 2023-12-02 )

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 06:36 UT (#1170349-53)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 8927 with AT 2023qzg - 2024-01-13 (T+137.5d)
Image below (2024-01-13.174) was taken 137.5 days after discovery of 2023qzg
Position of earlier transient (not visible, likely faded) is shown by white cross-hairs
Non Detection, limiting magnitude +18.5 (Clear Filter)
(Gaia reports mag +20.32 on 2024-01-04 )
Single frame only

Annotated CCD Image (150% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-01-13 04:10 UT (#1181133)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rcj - Type QSO Transient (discovered 2023-08-19)

AT 2023rcj (Virgo)
AT 2023rcj (Type: QSO) discovered 2023-08-19.096 UT by Gaia
Alias: Gaia23bzg,
Discovery Magnitude 16.76 (G-Gaia Filter) vs Historic Magnitude 17.29 +/- 0.14 (SD)
Brightening in known QSO ( [VV96] J130119.8-142456 )
( TNS 2023rcj | Gaia23bzg )

Star field with QSO Transient AT 2023rcj (T+147.1d)
Galaxies in FOV include NGC 4902 (catalog mag +10.9)
& PGC 44854 (catalog mag +15.0)

Annotated CCD Image (100% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-01-13 05:19 UT (#1181161)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rcj - 2024-01-13 (T+147.1d)
Image below (2024-01-13.222) was taken 147.1 days after discovery of 2023rcj
Position of QSO object (faint) is shown by white cross-hairs
Measured Magnitude +16.25 (Clear Filter)
Poor quality image (developing cloud, single frame)

Annotated CCD Image (125% size, linear scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2024-01-13 05:19 UT (#1181161)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rcj - 2024-02-23 (T+187.9d)
Image below (2024-02-23.038) was taken 187.9 days after discovery of 2023rcj
Position of QSO object (faint, stable) is shown by white cross-hairs
Measured Magnitude +16.25 (Clear Filter)

Annotated CCD Image (125% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-23 01:01 UT (#1189182-85)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rpu - Transient (discovered 2023-09-07) in UGC 4992

UGC 4992 with AT 2023rpu (Ursa Major)
AT 2023rpu (Type: unk) discovered 2023-09-07.510 UT by ALeRCE
Alias: ZTF23aaomzth, Gaia23cnt
Discovery magnitude 18.01 (r-ZTF filter) vs DSS Archival Image
Candidate SN near galaxy UGC 4992
( TNS 2023rpu | Gaia23cnt )

UGC 4992 - Spiral Galaxy
UGC 4992 (alias PGC 26625: catalog mag 15.4)
with adajcent galaxy
PGC 82381 (catalog mag +17.7)

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-12 00:33 UT (#1156112-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 4992 with AT 2023rpu - 2023-09-10 (T+2.6d)
Image below (2023-09-10.151) was taken 2.6 days after discovery of 2023rpu
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude ?15.95 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-10 03:43 UT (#1142161-63)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 4992 with AT 2023rpu - 2023-09-26 (T+18.5d)
Image below (2023-09-26.002) was taken 18.5 days after discovery of 2023rpu
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude ?

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-26 00:12 UT (#1149093-97)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 4992 with AT 2023rpu - 2023-10-05 (T+27.6d)
Image below (2023-10-05.086) was taken 27.6 days after discovery of 2023rpu
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude ?

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-05 02:12 UT (#1154177-81)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 4992 with AT 2023rpu - 2023-10-12 (T+34.5d)
Image below (2023-10-12.017) was taken 34.5 days after discovery of 2023rpu
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +17.01 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-12 00:33 UT (#1156112-16)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 4992 with AT 2023rpu - 2023-10-23 (T+45.6d)
Image below (2023-10-23.133) was taken 45.6 days after discovery of 2023rpu
Position of reported transient (very faint) is shown by white cross-hairs
Measured magnitude ?

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-23 03:20 UT (#1158257-61)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rrr - Type QSO Transient (discovered 2023-09-02), QSO J0136+4751

AT 2023rrr (Andromeda)
AT 2023rrr (Type: QSO) discovered 2023-09-02.139 UT by Gaia
Alias: Gaia23cfc
Discovery Magnitude 16.04 (G-Gaia Filter)
vs Historic Mag 18.43 +/- 0.778 SD
Brightening in known QSO (QSO J0136+4751)
Gaia, 2022-02-24 22:20, mag 18.78
Gaia, 2023-08-08 21:24, mag 17.19
Gaia, 2023-09-02 03:20, mag 16.04
Gaia, 2023-12-08 08:00, mag 17.15
Gaia, 2023-12-16 06:19, mag 17.80
( TNS 2023rrr | Gaia23cfc )

AT 2023rrr - 2023-11-15 (T+74.8d)
Image below (2023-11-15.976) was taken 74.8 days after discovery of 2023rrr
Position of reported transient (faint but relatively distinct) is shown by white cross-hairs
Measured Mag +17.26 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-15 23:33 UT (#1167209-13)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rrr - 2023-12-02 (T+90.9d)
Image below (2023-12-02.032) was taken 90.9 days after discovery of 2023rrr
Position of reported transient (faint but relatively distinct) is shown by white cross-hairs
Measured Mag +17.13 (Clear Filter)
Continue to monitor

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 00:49 UT (#1170205-06)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023rrr - 2024-02-16 (T+167.7d)
Image below (2024-02-16.845) was taken 167.7 days after discovery of 2023rrr
Position of reported transient (very faint & fading) is shown by white cross-hairs
Measured Mag +17.85 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-16 20:25 UT (#1186050-54)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023see - Type HP Transient (discovered 2023-09-12) in CGCG 462-013 (PGC 9313) - Unconfirmed

CGCG 462-013 with AT 2023see (Aries)
AT 2023see (Type: HP) discovered 2023-09-12.699 UT by Shuji Tokuoka
Discovery Mag 16.9 (Clear Filter)
( TNS 2023see )

CGCG 462-013 - Galaxy
CGCG 462-013 (Alias PGC 9313, Catalog Mag +15.7)
with adjacent galaxy NGC 924 (PGC 9302, Catalog Mag +13.5)

Annotated CCD Image (50% size, square root scale)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-20 23:27 UT (#1147093-96)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

CGCG 462-013 with AT 2023see - 2023-09-20 (T+8.3d)
Image below (2023-09-20.972) was taken 8.3 days after discovery of 2023see
Position of reported transient (not visible) is shown by white circle
No sign of transient object at reported coordinates.

AT 2023seo - Transient (discovered 2023-09-13) in NGC 1272 (Attempt)

NGC 1272 with AT 2023seo (Perseus)
AT 2023seo (Type: unk) discovered 2023-09-13.440 UT by ATLAS
Alias: ATLAS23sjh
Discovery Mag +16.65
( Rochester Supernova site | TNS 2022zxr )

NGC 1272 with AT 2023seo - 2023-09-14 (T+1.4d)
Image below (2023-09-14.884) was taken 1.4 days after discovery of 2023seo
Position of reported transient (not distinguishable) is shown by white cross-hairs
Very poor quality image (cloud, poor guiding, single frame)

Annotated CCD Image (150% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-09-14 21:13 UT (#1144050)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1272 with AT 2023seo - 2023-09-16 (T+3.5d)
Image below (2023-09-16.917) was taken 3.5 days after discovery of 2023seo
Position of reported transient (not distinguishable) is shown by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-16 22:10 UT (#1145034-38)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Annotated CCD Image (150% size, log scale, cropped)
Image details as above

NGC 1272 with AT 2023seo - 2023-09-25 (T+12.4d)
Image below (2023-09-25.856) was taken 12.4 days after discovery of 2023seo
Position of reported transient (not distinguishable) is shown by white cross-hairs

Annotated CCD Image (150% size, log scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-25 20:42 UT (#1149014-18)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 1272 - Earlier Image (Nov 2012)
NGC 1272 (lying at image centre) is part of Perseus A / Abell 426 Galaxy Cluster

CCD Image (square root scaling, 60% size)
7 x 120s (average combine), 3x3 binning, C filter
2012-11-17 21:35h UT (#526363-69)
12" LX200R (at f/9.7) + ST-10XME

AT 2023sqw - Transient (discovered 2023-09-15) in NGC 205 (M110) (Unconfirmed)

NGC 205 with AT 2023sqw (Andromeda)
AT 2023sqw (Type: unk) discovered 2023-09-15.249 UT by Chris Spratt
Discovery Mag 17.47 (G-Gaia Filter)
Transient was discovered by C. E. Spratt on images obtained at the
Rothney Astrophysical Observatory (University of Calgary) Baker-Nunn Schmidt + CCD
Transient reported by Dave Balam
( TNS 2023sqw )

NGC 205 (M110) - Elliptical Galaxy with AT 2023sqw (T+5.7d)
Position of reported transient (not visible) is shown by white circle

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-20 22:07 UT (#1147056-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 205 with AT 2023sqw - 2023-09-17 (T+1.8d)
Image below (2023-09-17.042) was taken 1.8 days after discovery of 2023sqw
Position of reported transient (not visible) is shown by white circle
No sign of transient object at its reported coordinates.
Image's Limiting Mag +18.40 (vs Discovery Mag 17.47)
Object is deemed as being 'unconfirmed'

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-17 01:09 UT (#1145105-09)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 205 with AT 2023sqw - 2023-09-19 (T+3.8d)
Image below (2023-09-19.015) was taken 3.8 days after discovery of 2023sqw
Position of reported transient (not visible) is shown by white circle
No sign of transient object at reported coordinates.

Annotated CCD Image (150% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-19 00:24 UT (#1146106-07)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 205 (M110) with AT 2023sqw - 2023-09-20 (T+5.7d)
Image below (2023-09-20.916) was taken 5.7 days after discovery of 2023sqw
Position of reported transient (not visible) is shown by white circle
No sign of transient object at reported coordinates.

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-20 22:07 UT (#1147056-60)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 205 (M110) with AT 2023sqw - 2023-09-22 (T+6.8d)
Image below (2023-09-22.027) was taken 6.8 days after discovery of 2023sqw
Position of reported transient (not visible) is shown by white circle
No sign of transient object at reported coordinates.

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-22 00:48 UT (#1148097-101)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 205 with AT 2023sqw - 2023-09-26 (T+10.9d)
Image below (2023-09-26.133) was taken 10.9 days after discovery of 2023sqw
Position of reported transient (not visible) is shown by white circle
No sign of transient object at reported coordinates.

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-26 03:20 UT (#1149153-57)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - Type BL Transient, QSO B1028+511 (discovered 2023-09-15)

AT 2023tdi (Ursa Major)
AT 2023tdi (Type: BL) discovered 2023-09-15.424 UT by Gaia
Alias: Gaia23ckv, QSO B1028+511
Discovery Mag 16.34 (G-Gaia Filter) vs Historic Mag 14.06
Known BL Lac type object (QSO B1028+511) brightens by 0.5 mag
( TNS 2023tdi | Gaia23ckv )

AT 2023tdi (T+14.8d)
Alias: Gaia23ckv, QSO B1028+511

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-30 04:28 UT (#1151127-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-09-22 (T+6.7d)
Image below (2023-09-22.105) was taken 6.7 days after discovery of 2023tdi
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +15.51 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-22 02:34 UT (#1148146-47)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-09-26 (T+10.7d)
Image below (2023-09-26.165) was taken 10.7 days after discovery of 2023tdi
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +15.58 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-26 04:07 UT (#1149168-72)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-09-30 (T+14.8d)
Image below (2023-09-30.181) was taken 14.8 days after discovery of 2023tdi
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude +15.67 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-09-30 04:28 UT (#1151127-31)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-10-02 (T+16.7d)
Image below (2023-10-02.144) was taken 16.7 days after discovery of 2023tdi
Position of reported transient (faint but distinct) is shown by white cross-hairs
Measured Magnitude +15.64 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-02 03:37 UT (#1152065-69)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-10-05 (T+19.7d)
Image below (2023-10-05.101) was taken 19.7 days after discovery of 2023tdi
Position of reported transient (faint, stable) is shown by white cross-hairs
Measured Magnitude +15.63 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-05 02:34 UT (#1154184-88)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-10-12 (T+26.7d)
Image below (2023-10-12.134) was taken 26.7 days after discovery of 2023tdi
Position of reported transient (faint, stable) is shown by white cross-hairs
Measured Magnitude +15.64 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-12 03:22 UT (#1156191-95)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-10-23 (T+37.7d)
Image below (2023-10-23.148) was taken 37.7 days after discovery of 2023tdi
Position of reported transient (faint, stable) is shown by white cross-hairs
Measured Magnitude +15.60 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-23 03:41 UT (#1158265-69)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-11-01 (T+46.6d)
Image below (2023-11-01.006) was taken 46.6 days after discovery of 2023tdi
Position of reported transient (faint, stable) is shown by white cross-hairs
Measured Magnitude +15.61 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
180s exposure (single frame), 3x3 binning, Clear Filter
2023-11-01 00:08 UT (#1159011)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-11-05 (T+51.4d)
Image below (2023-11-05.865) was taken 51.4 days after discovery of 2023tdi
Position of reported transient (faint, stable) is shown by white cross-hairs
Measured Magnitude +15.60 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-05 20:50 UT (#1160035-37)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-12-20 (T+95.6d)
Image below (2023-12-20.065) was taken 95.6 days after discovery of 2023tdi
Position of reported transient (faint, stable) is shown by white cross-hairs
Measured Magnitude +15.60 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-20 01:43 UT (#1176040-44)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tdi - 2023-12-29 (T+105.4d)
Image below (2023-12-29.824) was taken 105.4 days after discovery of 2023tdi
Position of reported transient (faint, fading slowly?) is shown by white cross-hairs
Measured Magnitude +15.70 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-29 19:52 UT (#1178022-24)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tsk - Type BL Transient (discovered 2023-09-25)

AT 2023tsk (Bootes)
AT 2023tsk (Type: BL) discovered 2023-09-25.828 UT by Gaia
Alias: Gaia23cqg
Discovery Magnitude 14.76 (g-Gaia Filter)
vs Prior Non-Detection Limiting Magnitude 21.5 ?
vs Historic Magnitude 15.94 +/- 0.41 SD
Known BL Lac brightens by 2 mag in 45 months
Gaia, 2018-05-07 23:58, mag 15.01
Gaia, 2019-11-04 01:17, mag 16.99
Gaia, 2023-01-26 17:20, mag 15.50
Gaia, 2023-09-25 19:53, mag 14.76
Gaia, 2023-11-06 15:16, mag 15.51
Gaia, 2023-12-05 07:22, mag 15.30
Gaia, 2024-01-04 02:51, mag 15.54
( TNS 2023tsk | Gaia23cqg )

AT 2023tsk - 2024-02-26 (T+153.2d)
Image below (2024-02-26.034) was taken 153.2 days after discovery of 2023tsk
Position of reported transient (faint but distinct) is shown by white cross-hairs
Measured Magnitude +15.10 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-26 00:56 UT (#1192132-35)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tsk - 2024-03-16 (T+172.3d)
Image below (2024-03-16.104) was taken 172.3 days after discovery of 2023tsk
Position of reported transient (faint but distinct) is shown by white cross-hairs
Measured Magnitude +15.55 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-16 02:38 UT (#1198161-65)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tsk - 2024-03-22 (T+178.3d)
Image below (2024-03-22.094) was taken 178.3 days after discovery of 2023tsk
Position of reported transient (faint but brightening) is shown by white cross-hairs
Measured Magnitude +15.03 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-22 02:24 UT (#1200043-47)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023tsk - 2024-03-27 (T+184.1d)
Image below (2024-03-27.962) was taken 184.1 days after discovery of 2023tsk
Position of reported transient (faint, fading again) is shown by white cross-hairs
Measured Magnitude +15.35 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-03-27 23:12 UT (#1201005-08)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023uhx - LRN Type Transient (discovered 2023-10-07) in NGC 3893

NGC 3893 with AT 2023uhx (Ursa Major)
AT 2023uhx (Type: LRN) discovered 2023-10-07.816 UT by Koichi Itagaki
Discovery magnitude 17.2 (Clear filter) vs DSS Archival Image
Luminous Red Nova based on its peak luminosity, and narrow Balmer and Fe II emission lines.
( TNS 2023uhx)

NGC 3893 - Spiral Galaxy, with AT 2023uhx (T+4.2d)
NGC 3893 (Alias: Herschel II-738)
with adajcent galaxies NGC 3896 (catalog mag +12.4 or +14.1)
and PGC 36913 (catalog mag +15.5)
[ Herschel 400 Objects ]

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-12 00:53 UT (#1156119-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 - Spiral Galaxy with AT 2023uhx (T+33.2d)

Annotated CCD Image (70% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-10 00:50 UT (#1164124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 - Detail

Annotated CCD Image (125% size, square root scale, cropped)
Image details as above

Negative CCD Image (125% size, square root scale, cropped)
Image details as above

NGC 3893 with AT 2023uhx - 2023-10-12 (T+4.2d)
Image below (2023-10-12.031) was taken 4.2 days after discovery of 2023uhx
Position of reported transient (faint but distinct) is shown by white cross-hairs
Measured magnitude +17.01 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-12 00:53 UT (#1156119-23)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2023-11-01 (T+24.2d)
Image below (2023-11-01.044) was taken 24.2 days after discovery of 2023uhx
Position of reported transient (faint but still distinct) is shown by white cross-hairs
Measured magnitude ? (unable to extract in SExtractor

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-01 01:09 UT (#1159036-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2023-11-09 (T+32.4d)
Image below (2023-11-09.178) was taken 32.4 days after discovery of 2023uhx
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +17.35 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-09 04:23 UT (#1163247-50)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2023-11-10 (T+33.2d)
Image below (2023-11-10.029) was taken 33.2 days after discovery of 2023uhx
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +18.00 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-10 00:50 UT (#1164124-28)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2023-11-12 (T+35.3d)
Image below (2023-11-12.152) was taken 35.3 days after discovery of 2023uhx
Position of reported transient (faint) is shown by white cross-hairs
Measured magnitude +17.96 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-12 03:48 UT (#1165215-19)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2023-11-16 (T+39.2d)
Image below (2023-11-16.039) was taken 39.2 days after discovery of 2023uhx
Position of reported transient (faint, but brightening) is shown by white cross-hairs
Measured magnitude +17.42 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-16 01:04 UT (#1167244-48)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2023-12-02 (T+55.4d)
Image below (2023-12-02.238) was taken 55.4 days after discovery of 2023uhx
Position of reported transient (faint, but brightening) is shown by white cross-hairs
Measured magnitude +17.30 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-02 05:52 UT (#1170335-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2024-01-08 (T+92.4d)
Image below (2024-01-08.227) was taken 92.4 days after discovery of 2023uhx
Position of reported transient (faint & fading) is shown by white cross-hairs
Measured Magnitude 17.67 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-08 05:35 UT (#1180212-15)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2024-01-17 (T+101.3d)
Image below (2024-01-17.092) was taken 101.3 days after discovery of 2023uhx
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude 17.56 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-01-17 02:21 UT (#1183040-44)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2024-02-13 (T+128.2d)
Image below (2024-02-13.035) was taken 128.2 days after discovery of 2023uhx
Position of reported transient (faint but brightening) is shown by white cross-hairs
Measured Magnitude 17.30 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-13 00:59 UT (#1184113-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2024-02-14 (T+129.3d)
Image below (2024-02-14.069) was taken 129.3 days after discovery of 2023uhx
Position of reported transient (faint) is shown by white cross-hairs
Measured Magnitude 17.30 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-14 01:49 UT (#1185182-86)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2024-02-20 (T+136.0d)
Image below (2024-02-20.858) was taken 136.0 days after discovery of 2023uhx
Position of reported transient (very faint) is shown by white cross-hairs
Measured Magnitude 18.48 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
4 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-20 20:42 UT (#1187014-17)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2024-02-26 (T+141.2d)
Image below (2024-02-26.049) was taken 141.2 days after discovery of 2023uhx
Position of reported transient (very faint & barely visible) is shown by white cross-hairs
Estimated Magnitude +18.5 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-26 01:13 UT (#1192138-39)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3893 with AT 2023uhx - 2024-02-28 (T+143.2d)
Image below (2024-02-28.016) was taken 143.2 days after discovery of 2023uhx
Position of reported transient (very faint & barely visible) is shown by white cross-hairs
Estimated Magnitude +18.5 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-28 00:32 UT (#1194185-89)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023uma - Transient (discovered 2023-10-09) in NGC 7427

NGC 7427 with AT 2023uma (Pegasus)
AT 2023uma (Type: unk) discovered 2023-10-09.235 UT by ZTF
Alias: ZTF23abivuzt
Discovery magnitude 18.13 (r-ZTF filter) vs last non-detection limiting mag 20.56 (g-ZTF)
( TNS 2023uma)

NGC 7427 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-11 21:37 UT (#1156039-40)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 7427 with AT 2023uma - 2023-10-11 (T+2.7d)
Image below (2023-10-11.898) was taken 2.7 days after discovery of 2023uma
Position of reported transient (not separately distinguishable) is shown by white cross-hairs
Measured magnitude +14.54 (Transient + Nucleus)

Annotated CCD Image (150% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-10-11 21:37 UT (#1156039-40)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023uta - Type SLSN-I Transient (discovered 2023-10-12) in LEDA 213371 (Attempt)

LEDA 213371 with AT 2023uta (Lynx)
2023uta (Type: SLSN-I) discovered 2023-10-12.360 UT by ASAS-SN
Alias: ASASSN-23hb, ATLAS23ttz
Discovery magnitude 16.8 (g-Sloan Filter)
vs Prior Non-Detection Limiting Magnitude 17.5
( TNS 2023uta )

LEDA 213371 - Galaxy
LEDA 213371 / PGC 213371 (catalog mag +16.0)
along with adjacent galaxy
PGC 20289 (catalog mag +15.4)

Annotated CCD Image (50% size, square root scale)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-22 00:39 UT (#1188135-38)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

LEDA 213371 with AT 2023uta - 2024-02-22 (T+132.7d)
Image below (2024-02-22.022) was taken 132.7 days after discovery of 2023uta
Position of reportedsupernova (faded & no longer visible) is shown by white cross-hairs
Non-Detectiion Limiting Magnitude +18.0 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped)
2 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-22 00:39 UT (#1188135-38)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vqz - Type QSO Transient (discovered 2023-10-16) in WISEA Galaxy

AT 2023vqz (Auriga)
In WISEA J064410.86+354644.6
AT 2023vqz (Type: QSO) discovered 2023-10-16.370 UT by Gaia
Alias: Gaia23cxv
Discovery magnitude 15.39 (G-Gaia Filter)
vs Historic magnitude 16.31 +/- 0.25 SD

Brightening in known QSO
Gaia, 2019-04-11 18:20, mag 16.08
Gaia, 2020-03-13 07:16, mag 15.90
Gaia, 2023-04-09 20:40, mag 15.50
Gaia, 2023-10-16 10:40, mag 15.41
( Whilst discovery alert only triggered on 2023-10-16 (at Historic Mag - 3 *SD)
the QSO has been brighter than normal range (16.0-16.6) since 2020-03-13 )
( TNS 2023vqz | Gaia23cxv )

AT 2023vqz - 2024-02-13 (T+120.6d)
Image below (2024-02-13.968) was taken 120.6 days after discovery of 2023vqz
Position of reported transient (faint but distinct) is shown by white cross-hairs
Measured Magnitude + 15.12 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-13 23:23 UT (#1185125-29)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vqz - 2024-02-24 (T+131.5d)
Image below (2024-02-24.892) was taken 131.5 days after discovery of 2023vqz
Position of reported transient (faint but distinct) is shown by white cross-hairs
Measured Magnitude + 15.08 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2024-02-24 21:35 UT (#1191061-65)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vss - MP? Type Transient (discovered 2023-10-24) in NGC 924

NGC 924 with AT 2023vss (Aries)
AT 2023vss (Type: MP?) discovered 2023-10-24.401 UT by ANTARES
Alias: ZTF23abnazem
Discovery Mag 17.06 (r-ZTF Filter)
( TNS 2023vss )

NGC 924 - Spiral Galaxy
with adjacent galaxy PGC 9313 (Alias CGCG 462-013, Catalog Mag +15.7)

Annotated CCD Image (50% size, square root scale)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-06 00:37 UT (#1160044-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 924 with AT 2023vss - 2023-11-06 (T+12.6d)
Image below (2023-11-06.022) was taken 12.6 days after discovery of 2023vss
Position of reported transient (not visible) is shown by white cross-hairs
Non-Detection, Limiting Mag +18.7 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped)
3 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-11-06 00:37 UT (#1160044-46)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 924 - Pre-Transient, 2023-09-20 (T-33.4d)
Image taken one month prior to discovery of AT 2023vss

AT 2023ycc - Transient (discovered 2023-11-12) in NGC 5395

NGC 5395 with AT 2023ycc (Canes Venatici)
AT 2023ycc (Type: unk) discovered 2023-11-12.641 UT by Gaia
Alias: Gaia23ddx
Discovery Magnitude 18.10 (G-Gaia Filter)
Candidate SN near galaxy NGC 5395
Gaia 2023-11-12 15:23 18.10 (T+0.0d)
Gaia 2023-12-07 01:39 19.05 (T+24.4d)
Gaia 2024-01-06 19.21 19.52( T+55.2d)
( TNS 2023ycc | Gaia23ddx )

NGC 5395 - Spiral Galaxy
NGC 5394 / NGC 5395 (ARP 84) - "The Heron"
[ ARP Galaxies ]

Other galaxies in FOV
IC 4356 (catalog mag +16.0), PGC 2102129 (catalog mag +16.8)

Annotated CCD Image (50% size, square root scale)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 06:10 UT (#1172280-84)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5395 with AT 2023ycc - 2023-12-06 (T+23.6d)
Image below (2023-12-06.251) was taken 23.6 days after discovery of 2023ycc
Position of reported transient (very faint ) is indicated by white cross-hairs

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-06 06:10 UT (#1172280-84)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image (100% size, square root scale, cropped)
Image details as above

Images of AT 2023ycc (in NGC 5395) on Supernova 2023 Page >>

AT2023aaiv - GRB Afterglow Transient (discovered 2023-12-15) - Attempted Observation

AT 2023aaiv (Cassiopeia)
AT 2023aaiv (Type: Afterglow) discovered 2023-12-15.437 UT by MASTER
Alias: MASTER OT J003857.42+573849.6, GRB 231215A
Discovery Magnitude 16.5 (Clear Filter)
Optical counterpart to GRB 231215A
( TNS 2023aaiv )

AT 2023aaiv - 2023-12-17 (T+2.5d)
Image below (2023-12-17.954) was taken 2.5 days after discovery of 2023aaiv
Position of earlier reported transient (no longer visible) is shown by white circle

Annotated CCD Image (150% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-17 23:03 UT (#1174023-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaiv - 2023-12-17 Detail (T+2.5d)

Annotated Negative CCD Image (250% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-17 23:03 UT (#1174023-27)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaiv - 2023-12-19 (T+3.6d)
Image below (2023-12-19.000) was taken 3.6 days after discovery of 2023aaiv
Position of earlier reported transient (not visible ?) is shown by white circle

Annotated Negative CCD Image (250% size, square root scale, cropped)
5 x 180s exposure (average combine), 3x3 binning, Clear Filter
2023-12-19 00:09 UT (#1175043-47)
12" LX200R (at f/10.4) + ST-10XME
Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023aaiv - Reference Image

PanSTARRS DR1 Image (Negative)
(Captured from Aladin, cropped to same FOV as 250% size image above

This Web Page:	Astronomical Transients - 2023
Last Updated :	2024-04-21
Site Owner :	David Richards
Home Page :	David's Astronomy Web Site

David's Astronomy Pages (Deep Sky) Astronomical Transients - 2023