David's Astronomy Pages Images - Session 1155 (2023-10-05)

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Session Notes

AT 2022wyp - Transient (Attempt) AT 2023rfq - Type YSO? Transient AT 2023tvi - CV Type Transient (Near NGC 6834)     Nova AT 2023trk - Extragalactic Nova in M31 M33 - Spiral Galaxy with Transient AT 2023nou     NGC 6745 - Spiral Galaxy with Type II Supernova 2023ucy     - C/2017 K2 (PANSTARRS), Nova Cas 2021,  AT2023cub (CV), Nova M31 2023-10a? & NGC 2708 w/SN2023bee attempts failed (due to cloud/poor sky transparency)     Variable Stars (photometric monitoring) - BL Lac, SS Cyg, RR Tau      Nearby Stars (astrometric monitoring) - None     - GCVS DX Cnc attempt failed (due to cloud/poor sky transparency)

- Late night session (6.9 hrs), interrupted by and impacted by cloud during second half of session     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: 12°C (min) - CCD Temperature:   -10° C - Notes from 2023-10-05 >>     -

AT 2022wyp - Transient

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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 - 2023-10-06 (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

Images of AT 2023rfq on Transients 2023 Page >>

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AT 2023tvi - CV Type Transient (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 - 2023-10-06 (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

Images of AT 2023tvi on Transients 2023 Page >>

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AT 2023txn - CV Type Transient

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 - 2023-10-05 (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

Images of AT 2023txn on Transients 2023 Page >>

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Nova AT 2023trk - Extragalactic Nova 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 - 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

Images of Nova AT 2023trk (in M31) on Transients 2023 Page >>

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M33 - Spiral Galaxy with Transient AT 2023nou

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NGC 6745 - Spiral Galaxy with Type II Supernova 2023ucy

NGC 6745 with SN 2023ucy (Lyra) SN 2023ucy (Type: II) discovered 2023-10-05.151 UT by ZTF Alias: ZTF23abhzxwm Discovery Mag +17.90 (r-ZTF Filter)  ( Rochester Supernova site | TNS 2023ucy )

NGC 6745 with SN 2023ucy - 2023-10-05 (T+0.8d) Image below (2023-10-05.970) was taken 0.8 days after discovery of 2023ucy Position of SN (relatively distinct) is shown by white cross-hairs Measured magnitude +14.89 Location of SN 2023ucy seems also identical with earlier SN 2022prr (type IIn, discovered 2022-07-27)  ( TNS 2022prr )

Annotated CCD Image (150% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-10-05 23:22 UT (#1155025-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 6745 with SN 2022prr - Earlier Image 2022-11-20 (T+116.5d) Image below (2022-11-20.774) was taken 116.5 days after discovery of 2022prr Position of SN (bright) is shown by white cross-hairs Measured magnitude +15.00

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2022-11-20 18:43 UT (#1059035-39) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023ucy (NGC 6745) on Supernovae 2023 Page >>

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