David's Astronomy Pages Images - Session 1182 (2024-01-13)

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Images (S1183)

Objects	Session Notes
AT 2023cik - Transient in SDSS Galaxy AT 2023ctk - Type YSO Transient     NGC 682 - Elliptical Galaxy with Type Ia Supernova 2023xtg UGC 3274 - Elliptical Galaxy with Type Ia Supernova 2023cvn     Variable Stars (photometric monitoring) - None      Nearby Stars (astrometric monitoring) - None	- Evening Session (1.6 hrs) interrupted by cloud. Session finished early due to cloud & risk of winterery showers.     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature:  3°C (min) - CCD Temperature:   -20° C - Notes from 2024-01-13 >>     -

Observing Result

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AT 2023cik - Transient 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:  WISEA J025057.46+002209.7, PGC 1164187, catalog mag + 17.4)  with nearby galaxy 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 >>

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AT 2023ctk - Type YSO Transient

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 - 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, fading) 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

Images of AT 2023ctk on Transients 2023 Page >>

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NGC 682 - Elliptical Galaxy with Type Ia Supernova 2023xtg

NGC 682 with SN 2023xtg (Cetus) SN 2023xtg (Type: Ia) discovered 2023-11-14.527 UT by Koichi Itagaki Alias: Gaia23dny, PS23kun, ZTF23abqqixn, ATLAS23vth Discovery Magnitude 18.1 (Clear Filter) (Gaia, 2023-11-23 11:01:37 :  Alerting Magnitude 15.85 ) Confirmed SN Ia  ( TNS 2023xtg | Gaia23dny )

NGC 682 with SN 2023xtg - 2024-01-13 (T+60.3d) Image below (2024-01-13.860) was taken 60.3 days after discovery of 2023xtg Position of reported SN (not visible) is indicated by white cross-hairs Poor quality image (poor sky transparency / uneven sky background, altitude 12.7°)

Annotated CCD Image (125% size, square root scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-01-13 20:44 UT (#1182009-11) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 682 with SN 2023xtg - Earlier Image, 2023-12-05 (T+21.4d) Image below (2023-12-05.929) was taken 21.4 days after discovery of 2023xtg Position of reported SN (reasonably distinct) is indicated by white cross-hairs Measured Magnitude +16.10 (Clear Filter)

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2023-12-05 22:27 UT (#1172073-77) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023xtg (in NGC 682) on Supernova 2023 Page >>

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UGC 3274 - Elliptical Galaxy with Type Ia Supernova 2023cvn

UGC 3274 with SN 2023cvn (Orion) SN 2023cvn (Type: Ia) discovered 2023-03-09.810 UT by ATLAS Alias: ATLAS23dij, Gaia23blr Discovery Magnitude 18.28 (orange-ATLAS Filter) Confirmed SN Ia  ( TNS 2023cvn | Gaia23blr )

UGC 3274 - Elliptical Galaxy and UGC 3274 (alias PGC 17025 : catalog mag +15.1) with Adjacent Galaxies : PGC 17020 (catalog mag +15.6),   PGC 75301(catalog mag +15.8), PGC 17018 (catalog mag +15.9),  PGC 17024 (catalog mag +15.9),   PGC 17022 (catalog mag +16.0),  PGC 17028 (catalog mag +16.0),   PGC 17017 (catalog mag +16.1),  PGC 75324 (catalog mag +16.4),  PGC 75331 (catalog mag +16.8),  PGC 75323 (catalog mag +17.0),   PGC 75322 (catalog mag +16.9),  PGC 75325 (catalog mag +17.0),   PGC 1299005 (catalog mag +17.1),  PGC 75330 (catalog mag +17.1), PGC 1302460 (catalog mag +17.1),

Annotated CCD Image (70% size, square root scale) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-01-13 21:40 UT (#1182021-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

UGC 3274 with SN 2023cvn - 2024-01-13 (T+310.1d) Image below (2024-01-13.901) was taken 310.1 days after discovery of 2023cvn Position of reported SN (faded & no longer visible) is indicated by white cross-hairs Non Detection, limiting magnitude + (Clear Filter)

Annotated CCD Image (175% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-01-13 21:40 UT (#1182021-22) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2023cvn (in UGC 3274) on Supernova 2023 Page >>

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