David's Astronomy Pages Images - Session 1269 (2024-11-14)

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Session Notes

AT 2023pgq - CV Type Transient  (non-detection) AT 2023rdh - Transient (non-detection) AT 2023vqb - Type ulens? Transient AT 2023vvj - CV Type Transient (non-detection) AT 2024ajf - Transient (non-detection) AT 2024dcg - CV Type Transient AT 2024dyj - Type YSO? Transient AT 2024vid - Type MP Transient AT 2024vtp - Transient (non-detection) AT 2024aafw - Type CV? Transient  (non-detection)     CGCG 424-007 - Galaxy with Type Ia Supernova 2023uda LEDA 213371 - Galaxy with Type SLSN-I Transient AT 2023uta     M31 - Spiral Galaxy with Type FeII Transient AT 2024aayx MCG -1-33-30 - Irregular Galaxy with Type II Supernova 2024byg MRK 0628 - Galaxy with Type Ia Supernova 2024aakr     NGC 5235 - Spiral Galaxy with Type Ia Supernova  2024grb       - AT2024sgs, AT2024aart, NGC 5162 w/SN2024aawh, SN 2022uiv, SN 2023esp, SN 2024vcs & UGC 5426 w/SN2024aanq attempts failed (due to bad guiding)     Variable Stars (photometric monitoring) - SS Cyg, RZ LMi, BL Lac, CN Ori, FU Ori, RR Tau, SU Tau     Nearby Stars (astrometric monitoring) - HH And

- Late Night Session (10.0 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 2024-11-14 >>     - Guiding was very poor during the second half of the session, and resulted in failure of at least 7 target attempts.   After enabling 'Composite Slewing' in DeviceHub (to workaround Anomalous Slaved Dome behaviour), many of the image sets had the issue that PHD2 Guiding was getting turned off part way through the imaging, leaving many of the frames unguided. This was due to a sideffect of having Composite Slewing enabled, which causes Telescope.Slewing to become True whilst the Dome is making periodic small azimuth adjustments in position to keep up with the Telescope Tracking, and a "Stop guiding when mount slews" setting in PHD2 Advanced Settings/Guiding which was enabled in PHD2 on the Observatory Computer.   Issue subsequently fixed by disabling the setting in PHD2 Advanced Settings.

Observing Result

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AT 2023pgq - CV Type Transient (non-detection)

AT 2023pgq (Vulpecula) AT 2023pgq (Type: CV) discovered 2023-08-10.231 UT by MASTER Alias: MASTER OT J200702.28+282023.5 Discovery Magnitude 16.3 (Clear Filter) vs Prior Non-Detection Limiting Flux 18.1  ( TNS 2023pgq )

AT 2023pgq - 2024-11-14 (T+462.7d) Image below (2024-11-14.915) was taken 462.7 days after discovery of 2023pgq Position of reported transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +17.8 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 60s exposure (average combine), 3x3 binning, Clear Filter 2024-11-14 22:00 UT (#1269034-37) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023pgq on Transients 2023 Page >>

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AT 2023rdh - Transient (non-detection)

AT 2023rdh (Draco) AT 2023rdh (Type: unk) discovered 2023-09-01.378 UT by ATLAS Alias: ATLAS23rwi, ZTF23abaqakp Discovery Magnitude 16.27 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Flux 18.41  ( TNS 2023rdh )

AT 2023rdh - 2024-11-14 (T+440.6d) Image below (2024-11-14.955) was taken 440.6 days after discovery of 2023rdh Position of reported transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +17.8 (Clear Filter) Poor quality image (single frame)

Annotated CCD Image (100% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2024-11-14 22:55 UT (#1269063) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023rdh on Transients 2023 Page >>

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AT 2023vqb - Type ulens? Transient

AT 2023vqb (Camelopardalis) AT 2023vqb (Type: ulens?) discovered 2023-10-16.099 UT by Gaia Alias: Gaia23cxl Discovery Mag 14.51 (G-Gaia Filter) vs Historic Mag 14.86 +/- 0.10 SD Bright gal.plane source candidate microlensing event or Be-type outburst rises by 0.3 mag  ( TNS 2023vqb | Gaia23cxl )

AT 2023vqb - 2024-11-14 (T+395.9d) Image below (2024-11-14.990) was taken 395.9 days after discovery of 2023vqb Position of reported transient (trailed) is shown by white cross-hairs Very poor quality image (single frame, bad guiding)

Annotated CCD Image (250% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2024-11-14 23:45 UT (#1269087) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2023vqb - Earlier Image, 2024-02-21 (T+128.8d) Image below (2024-02-21.938) was taken 128.8 days after discovery of 2023vqb Position of reported transient (likely faded back to normal state) is shown by white cross-hairs Measured Magnitude +13.45 (Clear Filter) Star appears to be a double star

Annotated CCD Image (250% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-02-21 22:39 UT (#1188087-91) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023vqb on Transients 2023 Page >>

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AT 2023vvj - CV Type Transient (non-detection)

AT 2023vvj (Gemini) AT 2023vvj (Type: CV) discovered 2023-10-25.144 UT by GOTO Alias: GOTO23bay Discovery Magnitude 15.63 (L-GOTO Filter) vs Prior Non-Detection Limiting Flux 18.9  ( TNS 2023vvj )

AT 2023vvj - 2024-11-15 (T+386.9d) Image below (2024-11-15.052) was taken 386.9 days after discovery of 2023vvj Position of reported transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +17.6 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 60s exposure (single frame), 3x3 binning, Clear Filter 2024-11-15 01:15 UT (#1269130) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2023vvj on Transients 2023 Page >>

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AT 2024ajf - Transient (non-detection)

AT 2024ajf (Camelopardalis) AT 2024ajf (Type: unk) discovered 2024-01-16.386 UT by ATLAS Alias: ATLAS24bab, Gaia24aox Discovery Magnitude 14.72 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Flux 19.45 Candidate SN near faint PanSTARRS source Gaia, 2024-02-02 11:19, mag 16.72 Gaia, 2024-02-02 13:05, mag 16.93 Gaia, 2024-02-18 19:07, mag 18.73  ( TNS 2024ajf  | Gaia24aox )

AT 2024ajf - 2024-11-15 (T+303.6d) Image below (2024-11-15.008) was taken 303.6 days after discovery of 2024ajf Position of reported transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.4 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-15 00:19 UT (#1269109-12) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024ajf on Transients 2024 Page >>

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AT 2024dcg - CV Type Transient

AT 2024dcg (Lynx) AT 2024dcg (Type: CV) discovered 2024-02-19.350 UT by ATLAS Alias: ATLAS16dzn Discovery magnitude 16.15 (orange-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 19.51  ( TNS 2024dcg )

AT 2024dcg - 2024-11-15 (T+269.7d) Image below (2024-11-15.024) was taken 269.7 days after discovery of 2024dcg Position of earlier transient (faded & no longer visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.2 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 2 x 120s exposure (average combine), 3x3 binning, Clear Filter 2024-11-15 00:39 UT (#1269116-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dcg - Earlier Image, 2024-02-25 (T+5.7d) Image below (2024-02-25.071) was taken 5.7 days after discovery of 2024dcg Position of reported transient (faint) is shown by white cross-hairs Measured Magnitude +15.65 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 5 x 120s exposure (average combine), 3x3 binning, Clear Filter 2024-02-25 01:48 UT (#1191189-93) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024dcg on Transients 2024 Page >>

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AT 2024dyj - Type YSO? Transient

AT 2024dyj (Cepheus) AT 2024dyj (Type: YSO?) discovered 2024-03-03.475 UT by Gaia Alias: Gaia24avb Discovery magnitude 16.16 (G-Gaia Filter) vs Historic Magnitude 14.97 +/- 0.14 SD 1.2 mag dimming in candidate YSO  ( TNS 2024dyj | Gaia24avb )

AT 2024dyj in star field with dark nebulae

Annotated CCD Image (70% size, linear scale) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-14 23:08 UT (#1269066-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

AT 2024dyj - 2024-11-14 (T+256.5d) Image below (2024-11-14.960) was taken 256.5 days after discovery of 2024dyj Position of reported transient (faint but distinct) is shown by white cross-hairs Measured Magnitude +13.91 (Clear Filter) Star has likely returned to its normal magnitude level (14.97 G-Gaia Filter)

Annotated CCD Image (100% size, linear scale, cropped) 3 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-14 23:08 UT (#1269066-69) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024dyj on Transients 2024 Page >>

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AT 2024vid - Type MP Transient

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AT 2024vtp - Transient (non-detection)

AT 2024vtp (Canis Minor) AT 2024vtp (Type: unk) discovered 2024-09-20.216 UT by GOTO Alias: GOTO24gas Discovery Magnitude 16.77 (L-GOTO Filter) vs Prior Non-Detection Limiting Flux 18.70  ( TNS 2024vtp )

AT 2024vtp - 2024-11-15 (T+55.8d) Image below (2024-11-15.058) was taken 55.8 days after discovery of 2024vtp Position of reported transient (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +17.8 (Clear Filter)

Annotated CCD Image (100% size, linear scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2024-11-15 01:24 UT (#1269138) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of AT 2024vtp on Transients 2024 Page >>

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AT 2024aafw - Type CV? Transient (non-detection)

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CGCG 424-007 - Galaxy with Type Ia Supernova 2023uda

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LEDA 213371 - Galaxy with Type SLSN-I Transient AT 2023uta

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M31 - Spiral Galaxy with Type FeII Transient AT 2024aayx

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MCG -1-33-30 - Irregular Galaxy with Type II Supernova 2024byg

MCG -1-33-30 with SN 2024byg (Virgo) SN 2024byg (Type: II) discovered 2024-02-08.550 UT by ASAS-SN Alias: ASASSN-24ax Discovery Magnitude 16.3 ( Clear Filter)  ( TNS 2024byg )

MCG -1-33-30 with SN 2024byg - 2024-11-15 (T+280.7d) Image below (2024-11-15.253) was taken 280.7 days after discovery of 2024byg Position of earlier SN (not visible) is indicated by white cross-hairs. Poor quality image (bright sky background / poor sky transparency)

Annotated CCD Image (150% size, square root scale, cropped) 180s exposure (single frame), 3x3 binning, Clear Filter 2024-11-15 06:05 UT (#1269259) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

MCG -1-33-30 with SN 2024byg - Earlier Image, 2024-02-21 (T+12.5d) Image below (2024-02-21.035) was taken 12.5 days after discovery of 2024byg Position of reported SN (faint but distinct) is indicated by white cross-hairs. Measured Magnitude +15.90  (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-02-21 01:00 UT (#1187122-26) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024byg (in MCG -1-33-30) on Supernova 2024 Page >>

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MRK 0628 - Galaxy with Type Ia Supernova 2024aakr

MRK 0628 with SN 2024aakr (Cancer) SN 2024aakr (Type: Ia) discovered 2024-11-01.428 UT by ZTF Alias: ZTF18aclkbxr Discovery Magnitude 16.3 ( Clear Filter)  ( TNS 2024aakr )

MRK 0628 - Galaxy (Alias :  PGC 24859, catalog mag +16.0)

Annotated CCD Image (50% size, square root scale) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-15 04:16 UT (#1269216-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

MRK 0628 with SN 2024aakr - 2024-11-15 (T+13.7d) Image below (2024-11-15.176) was taken 13.7 days after discovery of 2024aakr Position of reported SN (not separately distinguishable) is indicated by white cross-hairs. Measured Magnitude +14.66 (Clear Filter),  Nucleus + SN (vs  PGC 24859 catalog mag  +16.0)

Annotated CCD Image (150% size, square root scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-11-15 04:16 UT (#1269216-17) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024aakr (in MRK 0628) on Supernova 2024 Page >>

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NGC 5235 - Spiral Galaxy with Type Ia Supernova 2024grb (non-detection)

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