David's Astronomy Pages Images - Session 1145 (2023-09-16)

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Session Notes

C/2022 A2 (PANSTARRS) - Comet C/2023 E1 (ATLAS) - Comet     AT 2023htu - Type ulens? Transient AT 2023rao - Transient AT 2023rfq - Type YSO? Transient AT 2023rgi - Type ulens? Transient AT 2023rsr - CV Type Transient (near NGC 947) AT 2023rud - Transient (Attempt)     IC 458 - Elliptical Galaxy with Type Ia Supernova 2023rgp M101 - Spiral Galaxy with Type IIL Supernova 2023ixf M108 - Spiral Galaxy with Type Ic Supernova 2023dbc     NGC 205 (M110) - Elliptical Galaxy with Transient AT 2023sqw (Attempt / Unconfirmed) NGC 1086 - Spiral Galaxy with Type II Supernova 2023rix NGC 1272 - Elliptical Galaxy with Transient AT 2023seo (Attempt) NGC 2326 - Spiral Galaxy with Type II Supernova 2023pgb     UGC 3174 - Irregular Galaxy with Type IIb Supernova 2023mut UGC 6983 - Spiral Galaxy with Type II Supernova 2022pru UGC 11858 - Spiral Galaxy with Type Ia Supernova 2023rjj         Variable Stars (photometric monitoring) - BL Lac      Nearby Stars (astrometric monitoring) - None

- Attempted all-night session (8.5 hrs)     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature:3.5°C (min) - CCD Temperature:  -15°/-20° C - Notes from 2023-09-16 >>     - Aurora Images/Video from 2023-09-16 >> -

C/2022 A2 (PANSTARRS) - Comet

C/2022 A2 (PANSTARRS) - 2023-09-16  (passing through Pegasus) Sun Distance 3.10 AU (receeding) Earth Distance 2.11 AU (316.1 million km)		C/2022 A2 (PANSTARRS) - 2023-09-16 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra -59.91 arcsec/hr, Dec -71.96 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2023-09-16 23:27 UT (#1145072-74) 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) 5 x 60s exposure (average combine), 3x3 binning, Clear Filter 2023-09-16 23:29 UT (#1145072-76) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2
Images of C/2022 A2 (PANSTARRS) on Comets 2023 Page >>

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C/2023 E1 (ATLAS) - Comet

C/2023 E1 (ATLAS) - 2023-09-16 (passing through Aquarius) Sun Distance 1.60 AU (receeding) Earth Distance 0.62 AU (92.9 million km)		C/2023 E1 (ATLAS) 2023-09-16, Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 27.58 arcsec/hr, Dec -127.48 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 3 x 45s exposure (average combine), 3x3 binning, Clear Filter 2023-09-16 23:09 UT (#1145055-57) 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) 15 x 45s exposure (average combine), 3x3 binning, Clear Filter 2023-09-16 23:14 UT (#1145055-69) 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 >>

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AT 2023htu - Type ulens? Transient

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 - 2023-09-17 (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

Images of AT 2023htu on Transients 2023 Page >>

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AT 2023rao - Transient

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 - 2023-09-17 (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

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

Images of AT 2023rao on Transients 2023 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 - 2023-09-17 (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

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 - 2023-09-17 (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

Images of AT 2023rgi on Transients 2023 Page >>

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AT 2023rsr - CV Type Transient (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 )

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

Images of AT 2023rsr on Transients 2023 Page >>

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AT 2023rud - Transient

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 - 2023-09-16 (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

Images of AT 2023rud 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 - 2023-09-16 (T+12.5d) Image below (2023-09-16.935) was taken 12.5 days after discovery of 2023rgp Position of reported transient (not separately distinguishable) is indicated by white cross-hairs. Measured Magnitude +13.41 (nucleus + SN)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-16 22:34 UT (#1145042-45) 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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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 ) SN 2023ixf (Type: IIL) discovered 2023-05-19.727 UT by Koichi Itagaki at Mag 14.9 is located near M101's prominant star-forming region NGC 5461.  The supernova resulted from a exploding red supergiant and lies just 21 million light years away.  It's the closest core-collapse supernova to us since SN 1993J which lit up M81 (some 12 million ly away) in Spring 1993. The SN is designated of type II-L (L for 'linear') , which is characterised by a rapid rise to maximum brightness  followed by a slow and gradual decrease, that is thought to be brought about by ejection of the dead stars' outer hydrogen shell. (from Article "Summer's Super Supernova", AstNow Magazine, Sep 2023, pp 36-39)

M101 with SN 2023ixf - 2023-09-16 (T+120.2d) Image below (2023-09-16.892) was taken 120.2 days after discovery of 2023ixf Position of supernova (distinct) is shown by white cross-hairs Measured Magnitude +13.11 (Clear Filter)

Annotated CCD Image (100% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-16 21:34 UT (#1145020-24) 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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M108 - Spiral Galaxy with Type Ic Supernova 2023dbc

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NGC 205 (M110) - Elliptical Galaxy with Transient AT 2023sqw (Attempted Observation / 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 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

Images of AT 2023sqw (NGC 205) on Transients 2023 Page >>

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NGC 1086 - Spiral Galaxy with Type II Supernova 2023rix

NGC 1086 with SN 2023rix (Perseus) SN 2023rix (Type: II) discovered 2023-09-05.365 UT by ALeRCE Discovery Magnitude 18.21 (g-ZTF Filter)  ( TNS 2023rix )

NGC 1086 with SN 2023rix - 2023-09-17 (T+11.7d) Image below (2023-09-17.076) was taken 11.7 days after discovery of 2023rix Position of reported transient (very faint) is indicated by white cross-hairs. Measured Magnitude ? (not resolveable in SExtractor)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-17 01:56 UT (#1145121-24) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023rix (in NGC 1086) on Supernova 2023 Page >>

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NGC 1272 - Elliptical Galaxy with Transient AT 2023seo (Attempted Observation)

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 - 2023-09-16 (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 - Earlier Image (Nov 2012) NGC 1272 (lying at image centre) is part of Perseus A / Abell 426 Galaxy Cluster

CCD Image (70% size, square root scale) 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

Images of AT 2023seo (NGC 1272) 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 - 2023-09-17 (T+35.6d) Image below (2023-09-17.117) was taken 35.6 days after discovery of 2023pgb Position of reported SN (faint) is indicated by white cross-hairs. Measured Magnitude +17.92 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-17 02:57 UT (#1145141-45) 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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UGC 3174 - Irregular Galaxy with Type IIb Supernova 2023mut

UGC 3174 with SN 2023mut (Orion) SN 2023mut (Type: IIb) discovered 2023-07-11.180 UT by ASAS-SN Alias: ASASSN-23fh Discovery Magnitude 15.2 (g-Sloan Filter)  ( TNS 2023mut )

UGC 3174 with SN 2023mut - 2023-09-17 (T+67.9d) Image below (2023-09-17.102) was taken 67.9 days after discovery of 2023mut Position of reported SN (distinct) is indicated by white cross-hairs. Measured Magnitude +15.13

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-17 02:35 UT (#1145134-38) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023mut (in UGC 3174) on Supernova 2023 Page >>

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UGC 6983 - Spiral Galaxy with Type II Supernova 2022pru

UGC 6983 with SN 2022pru (Ursa Major) SN 2022pru (Type: II) discovered 2022-07-27.130 UT by ASAS-SN Alias: ASASSN-22jo  ( Rochester Supernova site | TNS 2022pru )

UGC 6983 with SN 2022pru - 2023-09-16 (T+416.7d) Image below (2023-09-16.863) was taken 416.7 days after discovery of 2022pru Position of earlier SN (faded & no longer visible) is shown by white cross-hairs

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-16 20:50 UT (#1145006-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 6983 with SN 2022pru - Earlier Image, 2022-12-28 (T+153.9d) Image below (2022-12-28.075) was taken 153.9 days after discovery of 2022pru Position of SN (bright) is shown by white cross-hairs Measured magnitude +17.00 (aperture 8), fading

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2022-12-28 01:58 UT (#1076018-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2022pru (UGC 6983) on Supernovae 2022 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 - 2023-09-16 (T+11.6d) Image below (2023-09-16.951) was taken 11.6 days after discovery of 2023rjj Position of reported transient (faint but distinct) is indicated by white cross-hairs. Measured Magnitude +14.30 (SN + nucleus)

Annotated CCD Image (150% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-09-16 22:55 UT (#1145049-52) 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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