David's Astronomy Pages CCD Images - Session 874 (2021-03-22)

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Session Notes

AT 2021fbz - Extragalactic Nova in M31 (Attempt) AT 2021ckv - Type YSO Transient  (GCVS PR Ori) AT 2021dbp - Type CV Transient Nova Per 2020 - Nova (V1112 Per, AT 2020abap) IC 357 - Spiral Galaxy with AT 2021fyd (unconfirmed) UGC 3502 - Spiral Galaxy with Type Ia Supernova 2021cwc SN 2021xn - Type Ia Supernova in PGC 6041 AT 2021dtd - Type CV Transient AT 2021efk - Type CV Transient (unconfirmed) NGC 4015 & surrounding galaxies (NGC 4005, 4011, 4021, 4023) ARP 138 - Galaxies (NGC 4015 & PGC 37703) AT 2021bxp - Type CV Transient (faded) NGC 3515 - Spiral Galaxy with Possible Transient AT 2021fmd NGC 4005 & surrounding galaxies (NGC 3999, 4000, 4011, 4015) NGC 5018 - Elliptical Galaxy with Type Ia Supernova 2021fxy IC 863 - Spiral Galaxy with Type IIn Supernova 2021foa UGCA 310 - Irregular Galaxy (PGC 44264) UGCA 311 - Spiral Galaxy (PGC 44358) NGC 4227 - Spiral Galaxy with Type Ia Supernova 2021biz NGC 4631 - Spiral Galaxy with Type LRN Transient AT 2021biy     Variable Stars (photometric monitoring) - R CrB, SS Her, U Her, RZ LMi, BL Lac, RR Tau     Nearby Stars (astrometric monitoring) - DX Cnc, CN Leo

- All Night session (8.4 hours) - Main aims of the session were to acquire a selection of variable star, nearby star and comet targets and deep sky targets as sky conditions allowed allowed - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 1°C (min) - CCD Temperature:  -20°/25°C - Notes from 2021-03-22 >>    [ Local Files >> ]   -

AT 2021fbz - Extragalactic Nova in M31 (Attempt)

M31 with Nova 2021fbz (Andromeda) AT 2021fbz (Type: EGN) discovered 2021/03/08.397 UT by Koichi Itagaki Alias: PNV J00434013+4127123, XN03JR Discovery Magnitude 16.5  (Rochester Supernova site | TNS 2021fbz | Discovery Image )

M31 with Nova 2021fbz - 2021-03-22 (T+14.4d) Image below (2021-03-22.844) was taken 14.4 days after discovery of 2021fbz No indication of any object at reported position. Nova is unconfirmed

Annotated CCD Image  (50% size, log scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-22 20:23 UT (#874004-07) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

M31 with Nova 2021fbz - 2021-03-22 (T+14.4d) Image below (2021-03-22.844) was taken 14.4 days after discovery of 2021fbzj Transient's reported position is shown by white circle..

Annotated CCD Image  (100% size, log scale cropped) Image details as above

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AT 2021ckv - Type YSO Transient  (GCVS PR Ori)

AT 2021ckv / PR Ori  (Orion) AT 2021ckv (Type: YSO) discovered 2021/02/08.759 UT by Gaia Alias: Gaia21arx, GCVS PR Ori

AT 2021ckv / PR Ori - 2021-03-22 (T+42.1d) Image below (2021-03-22.871) was taken 42.1 days after discovery of 2021ckv Position of reported YSO Type Transient is shown by white cross-hairs. Measured Magnitude +11.2 (vs normal range of +12.2 to +13.6)

Annotated CCD Image  (50% size, linear scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-22 21:03 UT (#874017-21) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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AT 2021dbp - Type CV Transient

AT 2021dbp (Auriga) AT 2021dbp (Type: CV) discovered 2021/02/14.535 UT by Gaia Alias: Gaia21auv,  GSC 2374:280  ( Rochester Supernova site |  Gaia21auv ) Based on Gaia Alert at magnitude +10.04

AT 2021dbp - 2021-03-22 (T+36.4d) Image below (2021-03-22.885) was taken 36.4 days after discovery of 2021dbp CV is shown by white cross hairs.  Measured Magnitude +11.0 vs GSC magnitude  +10.2

Annotated CCD Image  (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-22 21:18 UT (#874025-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021dbp on Transients 2021 Page >>

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Nova Per 2020 - Nova (V1112 Per, AT 2020abap)

Nova Per 2020 (Perseus) Nova in Perseus discovered 2020/11/25.807 [ Novae ] Nova Per 2020 discovered independently by Seiji Ueda and Stanislav Korotkiy et al AT 2020abap (Type: CV) reported 2020/11/27.230 UT by PGIR Alias: N Per 2020 , PGIR20fbf, TCP J04291888+4354233, TCP J04291884+4354232, V1112 Per

Nova Per 2020 - 2021-03-22 (T+117.1d) Image below (2021-03-22.894) was taken 117.1 days after discovery of Nova Nova is shown by white cross hairs.  Measured magnitude +14.7

CCD Image (100% size, linear scale, cropped) 5 x 90s exposure (average combine), 3x3 binning, C Filter 2021-03-22 21:32 UT (#874033-37) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Per 2020 on Novae Page >>

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IC 357 - Spiral Galaxy with AT 2021fyd (unconfirmed)

IC 357 with AT 2021fyd (Taurus) AT 2021fyd (Type: unk) discovered 2021/03/17.187 UT by ZTF Alias: ZTF21aapdpup Discovery Magnitude 18.01 (Rochester Supernova site | TNS 2021fyd )

IC 357 with AT 2021fyd - 22 (T+5.7d) Image below (2021-03-22.905) was taken 5.7 days after discovery of 2021fyd Unable to identify transient. It might lay at or very close to  the galaxy' center Transient is unconfirmed.  Magnitude (nucleus) +14.9

CCD Image (125% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-22 21:48 UT (#874041-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021fyd (IC 357) on Transients 2021 Page >>

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UGC 3502 - Spiral Galaxy with Type Ia Supernova 2021cwc

UGC 3502 with SN 2021cwc (Camelopardalis) SN 2021cwc (Type Ia, z=0.021) discovered 2021/02/13.381 UT by ATLAS Alias: ATLAS21flz  ( Rochester Supernova site |  Giancarlo Cortini image | Odd Trondal image )

UGC 3502 with SN 2021cwc - 2021-03- 22 (T+37.5d) Image below (2021-03-22.919) was taken 37.5 days after discovery of 2021cwc SN is shown by white cross hairs.  SN has faded but is still just visible.

Annotated CCD Image  (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-22 22:12 UT (#874049-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021cwc (UGC 3502) on Supernovae 2021 Page >>

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SN 2021xn - Type Ia Supernova in PGC 6041

SN 2021xn (Perseus) Faint Galaxy (PGC 6041, SDSS J013751.16+533958.8, catalog mag +16.1) with Type Ia Supernova [ Supernovae ] SN 2021xn (Type: Ia) discovered 2021/01/10.158 UT by ZTF Alias: ZTF21aacvhsc  (Rochester Supernova site | Claudio Balcon image  )

PGC 6041 with SN 2021xn - 2021-03-22 (T+71.8d) Image below (2021-03-22.934) was taken 71.8 days after discovery of  2021xn Position of earlier SN is shown by white cross hairs.  SN has faded and is almost unrecognisable

Annotated CCD Image  (150% size, log scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-22 22:35 UT (#874056-60) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021xn (PGC 6041) on Supernovae 2021 Page >>

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AT 2021dtd - Type CV Transient, Be-type event

AT 2021dtd (Cepheus) AT 2021dtd (Type: CV) discovered 2021/02/20.084 UT by Gaia Alias: Gaia21bal,   GSC 2374:280  ( Rochester Supernova site | Gaia21bal ) 0.25 mag brightening in blue star, Be-type event

AT 2021dtd - 2021-03-22 (T+30.9d) Image below (2021-03-22.951) was taken 30.9 days after discovery of 2021dtd CV is shown by white cross hairs.   CV is shown by white cross hairs.   Measured Magnitude +10.8 Bright star is same FOV is HIP 105091 (mag +6.4)

Annotated CCD Image  (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-22 21:18 UT (#874025-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021dtd on Transients 2021 Page >>

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AT 2021efk - Type CV Transient (unconfirmed)

AT 2021efk (Auriga) AT 2021efk (Type: CV) discovered 2021/03/02.754 UT by XOSS Alias: XM57HT  ( Rochester Supernova site |  Gaia21bal )

AT 2021efk - 2021-03-22 (T+20.2d) Image below (2021-03-22.973) was taken 20.2 days after discovery of 2021efk Position of reported CV is shown by white circle.   No object visable at reported position. CV is unconfirmed, but it may have faded before image was taken

Annotated CCD Image  (100% size, linear scale, cropped) 4 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-22 23:25 UT (#874083-86) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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NGC 4015 & surrounding galaxies (NGC 4005, 4011, 4021, 4023)

NGC 4015 & surrounding galaxies (Coma Berenices) NGC 4015 (ARP 138) with NGC 4005, NGC 4011, NGC 4021 & NGC 4023 Ast.Now Deep Sky Challenge Object, Apr 2021  [ Deep Sky Challanges (Ast.Now) ]

Galaxies in field of view ARP 138:  NGC 4015 (catalog mag +13.5) & PGC 37703 (catalog mag +14.1) NGC 4005 (catalog mag +13.0),  NGC 4023 (catalog mag +14.6),  NGC 4011 (catalog +14.7), NGC 4021 (catalog mag +15.8), PGC 1724216 (catalog mag +17.0),   PGC 1725160 (catalog mag +17.4), PGC 1726138 (catalog mag +17.7), PGC 1721856 (catalog mag +18.0),

Annotated CCD Image  (70% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 00:09 UT (#874125-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image  (70% size, square root scale) Image details as above

NGC 4015 / ARP 138 - Earlier Image (2021-03-21) Suboptimal image (single sub only)

Annotated CCD Image (150% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, C Filter 2021-03-21 23:20 UT (#873010) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4015 (ARP 138) - Earlier Image (2008)

Annotated CCD Image 5 x 3 min exposure (average combine), 2x2 binning, C Filter 2008-02-16 05:28 h UT (#264512-16) 8" LX200 Classic + ST-7E

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ARP 138 - Galaxies (NGC 4015 & PGC 37703)

ARP 138 (Coma Berenices) NGC 4015 & PGC 37703 [ ARP Galaxies ]

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 00:09 UT (#874125-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

ARP 138- Detail NGC 4015 (catalog mag +13.5) & PGC 37703 (catalog mag +14.1)

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 00:09 UT (#874125-29) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image  (125% size, square root scale, cropped) Image details as above

ARP 138:  NGC 4015 & PGC 37703 - Earlier Image (2008)

Negative CCD Image  (200% size, cropped) 5 x 3 min exposure (average combine), 2x2 binning, C Filter  2008-02-16 05:28 h UT (#264512-16) 8" LX200 Classic + ST-7E

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AT 2021bxp - Type CV Transient (faded)

AT 2021bxp (Leo Minor) AT 2021bxp (Type: CV) discovered 2021/02/05.909 UT by XOSS Alias: XM51HT, TCP J10203579+3103424, ZTF21aaherhg  ( Rochester Supernova site )

AT 2021bxp - 2021-03-23 (T+45.1d) Image below (2021-03-23.022) was taken 45.1 days after reported discovery of 2021bxp Position of reported CV is shown by white circle.   Object is no longer visible at reported position and is presumed to have faded between T+22.1d and T+45.1d.

Annotated CCD Image  (50% size, linear scale) 5 x 60s exposure (average combine), 3x3 binning, C Filter 2021-03-23 00:36 UT (#874138-42) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2021bxp - Earlier Image (2021-02-28, T+22.1d) Image below (2021-02-28.053) was taken 22.1 days after reported discovery of 2021bxp CV is shown by white cross-hairs. Measured magnitude  +15.2

Annotated CCD Image  (50% size, linear scale) 3 x 60s exposure (average combine), 3x3 binning, C Filter 2021-02-28 01:20 UT (#865142-45) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021bxp on Type CV Transients Page >>

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NGC 3515 - Spiral Galaxy with Possible Transient AT 2021fmd

NGC 3515 with AT 2021fmd (Leo Minor) AT 2021fmd (Type: unk) discovered 2021/03/12.290 UT by ASAS-SN Alias: ASASSN-21de Discovery Magnitude 17.3 (ABMag vs Limiting flux: 17.5)  ( Rochester Supernova site | TNS 2021fmd )

NGC 3515 - Spiral Galaxy NGC 3515 / PGC 33467 (catalog mag  +13.9 or +14.8) with other galaxies in same FOV: PGC 1832094 (catalog mag +17.3), PGC 1830775 (catalog mag +17.7), PGC 1831688 (catalog mag +17.9), PGC 1831328 (catalog mag +18.2)

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 00:53 UT (#874146-50) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 3515 with AT 2021fmd - 2021-03-23 (T+10.7d) Image below (2021-03-23.031) was taken 10.7 days after reported discovery of 2021fmd No definate confirmation of transient object it may be faint or very close to galaxy nucleus Measured magnitude + 15.5 (nucleus+transient)

Annotated CCD Image  (125% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 00:53 UT (#874146-50) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021fmd (NGC 3515) on Transients 2021 Page >>

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NGC 4005 & surrounding galaxies (NGC 3999, 4000, 4011, 4015)

NGC 4005 & surrounding galaxies (Coma Berenices) NGC 4005 with NGC 3999, NGC 4000, NGC 4011 & NGC 4015 Ast.Now Deep Sky Challenge Object, Apr 2021  [ Deep Sky Challanges (Ast.Now) ]

Galaxies in field of view NGC 4005 (catalog mag +13.0), NGC 4015 (catalog mag +13.5) & PGC 37703 (catalog mag +14.1), NGC 3999 (catalog mag +15.5), NGC 4000 (catalog mag +15.1),   NGC 4011 (catalog +14.7), PGC 1724216 (catalog mag +17.0),   PGC 1726138 (catalog mag +17.7),

Annotated CCD Image  (70% size, square root scale) 6 x 90s exposure (average combine), 3x3 binning, C Filter 2021-03-23 01:13 UT (#874155-60) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Negative CCD Image  (70% size, square root scale) Image details as above

NGC 4005 (centre) - Detail Adjacent bright star is HIP 58364 (mag +8.27) Other galaxies in FOV are NGC 4000 & NGC 4011

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

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NGC 5018 - Elliptical Galaxy with Type Ia Supernova 2021fxy

NGC 5018 with SN 2021fxy (Virgo) SN 2021fxy (Type: Ia) discovered 2021/03/17.725 UT by Koichi Itagaki  ( Rochester Supernova site | Discovery Image | Paolo Campaner image ) SN 2021fxy is indicated by white cross-hairs.

Annotated CCD Image  (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 01:34 UT (#874164-67) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5018 with SN 2021fxy - 2021-03-23 (T+5.3d) Image below (2021-03-23.058) was taken 5.3 days after discovery of SN 2021fxy SN is indicated by white cross-hairs.  Measured magnitude + 14.5

Annotated CCD Image  (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 01:34 UT (#874164-67) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021fxy (NGC 5018) on Supernovae 2021 Page >>

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IC 863 - Spiral Galaxy with Type IIn Supernova 2021foa

IC 863 with SN 2021foa (Virgo) SN 2021foa (Type: IIn) discovered 2021/03/15.450 UT by ASAS-SN Alias: ASASSN-21dg  ( Rochester Supernova site | Discovery Image ) SN is indicated by white cross-hairs.

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 01:56 UT (#874170-74) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 863 with SN 2021foa - 2021-03-23 (T+7.6d) Image below (2021-03-23.074) was taken 7.6 days after discovery of 2021foa SN is indicated by white cross-hairs.  Measured magnitude ?  (+14.7 for SN & nucleus combined)

Annotated CCD Image  (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 01:56 UT (#874170-74) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021foa (IC 863) on Supernovae 2021 Page >>

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UGCA 310 - Irregular Galaxy (PGC 44264)

UGCA 310 (Virgo) Alias: PGC 44264 (catalog mag +14.5)   [ UGCA Galaxies ]  [ Irregular Galaxies ]

Annotated CCD Image  (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 02:20 UT (#874177-81) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 310 - Detail

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

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UGCA 311 - Spiral Galaxy (PGC 44358)

UGCA 311 (Virgo) Alias: PGC 44358 / MCG-1-33-60 (catalog mag +13.8)   [ UGCA Galaxies ]  [ Flat Galaxies ]

Annotated CCD Image  (50% size, square root scale) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 02:41 UT (#874184-88) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGCA 311 - Detail

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

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

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NGC 4227 - Spiral Galaxy with Type Ia Supernova 2021biz

NGC 4227 with SN 2021biz (Canes Venatici) SN 2021biz (Type: Ia) discovered 2021/01/29.543 UT by ATLAS Alias: ATLAS21dfz  (Rochester Supernova site | Gianluca Masi image | Jean-Claude Merlin image )

NGC 4227 with SN 2021biz - 2021-03-23 (T+52.6d) Image below (2021-03-23.128) was taken 52.6 days after discovery of 2021biz SN shown by white cross hairs.  Measured magnitude ?

Annotated CCD Image  (125% size, linear scale, cropped)  2 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 03:09 UT (#874198-99) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2021biz (NGC 4227) on Supernovae 2021 Page >>

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NGC 4631 - Spiral Galaxy with Type LRN Transient AT 2021biy

NGC 4631 with AT 2021biy (Canes Venatici) AT 2021biy (Type: LRN) discovered 2021/01/29.559 UT by ATLAS Alias: ATLAS21dfy (Discovery Note)  (Rochester Supernova site | Odd Trondal image | Nick James image ) LRN = Luminous Red Nova [ LRN Transients ]

NGC 4631 with AT 2021biy - 2021-03-23 (T+52.6d) Image below (2021-03-23.147) was taken 52.6 days after discovery of 2021biy LRN shown by white cross hairs.  Measured magnitude ? (fading)

Annotated CCD Image  (100% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, C Filter 2021-03-23 03:39 UT (#874207-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2021biy (NGC 4631) on Transients 2021 Page >>

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