David's Astronomy Pages Images - Session 1140 (2023-09-06)

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Session Notes

C/2020 R7 (ATLAS) - Comet C/2023 E1 (ATLAS) - Comet     Nova Cas 2021 - Nova (V1405 Cas) AT 2022szi - Transient (Attempt) AT 2023rfq - Type YSO? Transient AT 2023rgi - Type ulens? Transient     IC 458 - Elliptical Galaxy with Type Ia Supernova 2023rgp Nova M31 2023-05b? - Extragalactic Nova, AT2023ksu in M31  (Attempt) M33 - Spiral Galaxy with Transient AT 2023nou M101 - Spiral Galaxy with Type IIL Supernova 2023ixf     NGC 1461 - Spiral Galaxy with Unconfirmed Transient AT 2023och (Unconfirmed) NGC 2326 - Spiral Galaxy with Type II Supernova 2023pgb NGC 7714 - Spiral Galaxy with Type Ib Supernova 2023pso     UGC 11858 - Spiral Galaxy with Type Ia Supernova 2023rjj     Variable Stars (photometric monitoring) - RX And, BL Lac, X Tri      Nearby Stars (astrometric monitoring) -  Barnards Star   -

- Attempted all-night session (5.7 hrs)     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 12.5°C (min) - CCD Temperature:  -10°C - Notes from 2023-09-06 >>     -

C/2020 R7 (ATLAS) - Comet

C/2020 R7 (ATLAS) - 2023-09-06  (passing through Corona Borealis) Sun Distance 4.51 AU (receeding) Earth Distance 4.84 AU (723.4 million km)		C/2020 R7 (ATLAS) - 2023-09-06 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 5.33 arcsec/hr, Dec -8.99 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 7 x 60s exposure (average combine), 3x3 binning, Clear Filter 2023-09-06 22:48 UT (#1140013-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, square root scale, cropped) Image details as left
Images of C/2020 R7 (ATLAS) on Comets 2023 Page >>

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C/2023 E1 (ATLAS) - Comet

C/2023 E1 (ATLAS) - 2023-09-06 (passing through Aquarius) Sun Distance 1.49 AU (receeding) Earth Distance 0.49 AU (73.4 million km)		C/2023 E1 (ATLAS) 2023-09-06, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 30.19 arcsec/hr, Dec -206.03 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 2 x 45s exposure (average combine), 3x3 binning, Clear Filter 2023-09-06 23:39 UT (#1140051-52) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (100% size, square root scale, cropped) 13 x 45s exposure (average combine), 3x3 binning, Clear Filter 2023-09-06 23:44 UT (#1140051-65) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2023 E1 (ATLAS) on Comets 2023 Page >>

Light Artefact ? Light artefact on right hand side of image is believed to be from the mag 5.3 star HIP 108991 which lies 7.5' outside FOV

Annotated CCD Image (70% size, square root scale) 15 x 45s exposure (average combine), 3x3 binning, Clear Filter 2023-09-06 23:45 UT (#1140051-65) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

HIP 108991 Image showing position of HIP 108991 relative to above FOV (yellow rectangle) and Comet C/2023 E1 (ATLAS) (blue circle)

CMOS Image (16% size) 10s exposure (stacked), 1x1 binning 2023-09-04 02:27 UT (#Cam2_Ref) TS 80mm APO, ZWO ASI178MC & PHD2

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Nova Cas 2021 - Nova (V1405 Cas)

Nova Cas 2021 (Cassiopeia) Nova in Cassiopeia discovered 2021-03-18.4236,  by Yuji Nakamura (Japan) Magnitude at discovery +9.6 (unfiltered CCD) AT2021hkn (Type: Nova) reported by 2021/03/30.055 UT by Gaia Alias: Gaia21bpe, AT2021hkn, V1405 Cas

Nova Cas 2021 - 2023-09-07 (T+902.7d) Image below (2023-09-07.112) was taken 902.7 days after discovery of nova Nova is shown by white cross hairs.  Measured magnitude +12.06

Annotated CCD Image (100% size, linear scale, cropped) 5 x 30s exposure (average combine), 3x3 binning, Clear Filter 2023-09-07 02:43 UT (#1140127-31) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Nova Cas 2021 (V1405 Cas) Spectra - 2023-09-07 (T+902.7d)

Spectra produced in AstroMain using Image taken with Star Analyser 200 5 x 60s exposure (average combine), 2x2 binning, S Filter 2023-09-07 02:48 UT (#1140132-36) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of Nova Cas 2021 on Novae Page >>

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AT 2022szi - Transient (Attempt)

AT 2022szi (Andromeda) AT 2022szi (Type: unk) discovered 2022-08-30.322 UT by ZTF Alias: ZTF22abdsaqa Discovery Magnitude 15.94 (r-ZTF Filter)  ( TNS 2022szi )

AT 2022szi - 2023-09-07 (T+372.7d) Image below (2023-09-07.051) was taken 372.7 days after discovery of 2022szi Position of earlier reported transient (no longer visible) is shown by white circle

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-07 01:21 UT (#1140098-102) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2022szi on Transients 2022 Page >>

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AT 2023rfq - Type YSO? Transient

AT 2023rfq (Cygnus) AT 2023rfq (Type: YSO?) discovered 2023-08-24.114 UT by Gaia Alias: Gaia23cbk Discovery Mag 13.19 (G-Gaia Filter)  (vs Historic Mag 13.49) Brightening in candidate YSO  ( TNS 2023rfq | Gaia23cbk )

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

Images of AT 2023rfq on Transients 2023 Page >>

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AT 2023rgi - Type ulens? Transient

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

Images of AT 2023rgi on Transients 2023 Page >>

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IC 458 - Elliptical Galaxy with Type Ia Supernova 2023rgp

IC 458 with SN 2023rgp (Lynx) SN 2023rgp (Type: Ia) discovered 2023-09-04.456 UT by ZTF Alias: ZTF23abawgqs Discovery Magnitude 18.17 (g-ZTF Filter)  ( TNS 2023rjj )

IC 458 with SN 2023rgp - 2023-09-07 (T+2.6d) Image below (2023-09-07.035) was taken 2.6 days after discovery of 2023rgp Position of reported SN (not separately distinguishable) is indicated by white cross-hairs. Measured Magnitude +13.42 (nucleus + SN)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-07 00:59 UT (#1140091-95) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

IC 458 with SN 2023rgp - Detail 2023-09-07 (T+2.6d) Position of reported SN (just visible) is indicated by white cross-hairs

Annotated CCD Image (175% size, log scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-07 00:59 UT (#1140091-95) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023rgp (in IC 458) on Supernova 2023 Page >>

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M31 2023-05b? - Extragalactic Nova, AT2023ksu 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? - 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

Images of Nova M31 2023-05b? (M31) on Transients 2023 Page >> >>

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M33 - Spiral Galaxy with Transient AT 2023nou

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M101 - Spiral Galaxy with Type IIL Supernova 2023ixf

M101 with SN 2023ixf (Ursa Major) SN 2023ixf (Type: IIL) discovered 2023-05-19.727 UT by Koichi Itagaki Alias: ZTF23aaklqou, AT2023iyi, AT2023jgd, AT2023jfz, PSN J14033858+5418421, PS23dij Discoverer Mag 14.9 (Clear filter)  ( Rochester Supernova site | TNS 2023ixf )

M101 with SN 2023ixf - 2023-09-06 (T+110.2d) Image below (2023-09-06.931) was taken 110.2 days after discovery of 2023ixf Position of supernova (still distinct and fairly stable) is shown by white cross-hairs Measured Magnitude +13.37

Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-06 22:29 UT (#1140006-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023ixf (M101) on Supernova 2023 Page

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NGC 1461 - Spiral Galaxy with Unconfirmed Transient AT 2023och (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 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

Images of  AT 2023och (in NGC 1461) on Transients 2023 Page >>

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NGC 2326 - Spiral Galaxy with Type II Supernova 2023pgb

NGC 2326 with SN 2023pgb (Lynx) SN 2023pgb (Type: II) discovered 2023-08-12.496 UT by ZTF Alias: ZTF23aaxdfya Discovery Magnitude 17.44 ( r-ZTF)  ( TNS 2023pgb )

NGC 2326 with SN 2023pgb - 2023-09-07 (T+25.5d) Image below (2023-09-07.020) was taken 25.5 days after discovery of 2023pgb Position of reported SN (faint) is indicated by white cross-hairs. Measured Magnitude +17.73 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-07 00:38 UT (#1140084-88) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023pgb (in NGC 2326) on Supernova 2023 Page >>

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NGC 7714 - Spiral Galaxy with Type Ib Supernova 2023pso

NGC 7714 with SN 2023pso (Pisces) SN 2023pso (Type: Ib) discovered 2023-08-07.032 UT by GOTO Alias: GOTO23ur Discovery Magnitude 17.15 (L-GOTO Filter)  ( TNS 2023pso )

NGC 7714 with SN 2023pso - 2023-09-06 (T+31.0d) Image below (2023-09-06.998) was taken 31.0 days after discovery of 2023pso Position of earlier reported SN (not distinguishable) 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 00:04 UT (#1140069-72) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 7714 with SN 2023pso - 2023-09-06 (T+31.0d) Image below (2023-09-06.998) was taken 31.0 days after discovery of 2023pso Position of earlier reported SN (not distinguishable) is indicated by white cross-hairs.

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

Images of SN 2023pso (in NGC 7714) on Supernova 2023 Page >>

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UGC 11858 - Spiral Galaxy with Type Ia Supernova 2023rjj

UGC 11858 with SN 2023rjj (Cygnus) SN 2023rjj (Type: Ia) discovered 2023-09-05.340 UT by ALeRCE Alias: ZTF23abaxkwq Discovery Magnitude 18.17 (g-ZTF Filter)  ( TNS 2023rjj )

UGC 11858 with SN 2023rjj - 2023-09-07 (T+1.8d) Image below (2023-09-07.097) was taken 1.8 days after discovery of 2023rjj Position of reported transient (faint but distinct) is indicated by white cross-hairs. Measured Magnitude ? (unable to differentiate SN from nucleus)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-07 02:27 UT (#1140119-23) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023rjj (in UGC 11858) on Supernova 2023 Page >>

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