David's Astronomy Pages Images - Session 1282 (2024-12-12)

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Images (S1283)

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Session Notes

29P/Schwassmann-Wachmann - Comet     AT 2024fxd - Type Nova Transient AT 2024wqf - Type AGN Transient (4C 27.50) AT 2024aart - Type HPM Transient AT 2024accj - Type AGN Transient AT 2024adwa - Transient     GRB 241213A - Attempted GRB afterglow observation (non-detection) MRK 0628 - Galaxy with Type Ia Supernova 2024aakr     NGC 4192A - Spiral Galaxy with Type II Supernova 2024exw NGC 5151 - Spiral Galaxy with Type Ia Supernova 2024acnr     SN 2024adhf - Type Ia Supernova     UGC 5886 - Spiral Galaxy with Type IIn Supernova 2024hw     Variable Stars (photometric monitoring) - ER UMa     Nearby Stars (astrometric monitoring) - DX Cnc, CN Leo

- Post-Midnight Session (6.7 hr) partially interrupted by cloud.  Cold night  (-2°C).     - 12" LX200 + ST-10XME for imaging - TS 80mm APO + ZWO ASI178MC for guiding & imaging - Ambient Temperature: -2°C (min) - CCD Temperature: -25°C - Notes from 2024-12-12 >>     -

Observing Result

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29P/Schwassmann-Wachmann - Comet

29P/Schwassmann-Wachmann - 2024-12-13 (passing through Leo) Sun Distance 6.25 AU (receeding) Earth Distance 5.85 AU (875.6 million km)		29P/Schwassmann-Wachmann - 2024-12-13 Detail Autoguided on offset star using PHD2 with Lock Shift set at the comet's rate of motion (Ra 0.10 arcsec/hr, Dec -2.54 arcsec/hr)
Annotated CCD Image (50% size, square root scale) 7 x 90s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 04:58 UT (#1282105-13) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2		Annotated CCD Image (125% size, log scale, cropped) Image details as left
Images of 29P/Schwassmann-Wachmann on Comets 2023 Page >>
Images of 29P/Schwassmann-Wachmann on Comets 2024 Page >>

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AT 2024fxd - Type Nova Transient

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AT 2024wqf - Type AGN Transient (4C 27.50)

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AT 2024aart - Type HPM Transient

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AT 2024accj - Type AGN Transient

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AT 2024adwa - Transient

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GRB 241213A - Attempted GRB afterglow 7observation (non-detection)

GRB 241213A  (Lynx) Alias: GRB Swift 1274039 Burst at 2024-12-13 02:19:00 UT, Trigger: 1274039 Trigger Coords  07 44 35.496, +35 16 49.44 (confidence 3') Final Coords  07 44 41.130,  +35 16 44.60 (90% confidence 2") https://www.swift.ac.uk/sper/1274039/ https://www.swift.ac.uk/xrt_positions/01274039/ https://swift.gsfc.nasa.gov/results/BATbursts/1274039/bascript/top.html

GRB Swift 1274039 / GRB 241213A - 2024-12-13 (T+0.0d) Position of GRB (not visible) is shown by white circle

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 02:38 UT (#1282039-43) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

First Image of the GRB Swift 1274039 Target (02:19:57) taken 57s after the GRB Burst This is 5s Locate Frame that was used for fine-centering the telescope Image Linking (PlateSolving) indicated the telescope positional error after slew was 1.3' Yellow cross-hairs is the GRB Position from the Swift-BAT GRB Position Notice with a 3' error radius (blue circle). The white cross-hairs is the image centre Distance between yellow and white cross-hairs is 1.3'

Annotated Raw CCD Image (70% size, linear scale) 5s exposure (single frame), 3x3 binning, Clear Filter 2024-12-13 02:19:58 UT (#1282030) 12" LX200R (at f/10.4) + ST-10XME

First 30s image of the GRB Swift 1274039 Target (02:21:20) taken 2m 19s after the GRB Burst Blue circle is a 3.0' confidence (error) radius centred on the Swift BAT Alert Coordinates for 1274039 The final XRT determined position of the GRB 241213A (white cross-hairs) was added later.

Annotated Raw CCD Image (70% size, linear scale) 30s exposure (single frame), 3x3 binning, Clear Filter 2024-12-13 02:21:20 UT (#1282031) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

GRB Swift 1274039 / GRB 241213A  - 2024-12-13 (T+02m19s to T+04m15) Image below (2024-12-13.103) was taken 0.00007 - 0.00012  days after discovery of  GRB 241213A Position of GRB (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +18.5 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped 3 x 30s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 02:22 UT (#1282031-33) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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

GRB Swift 1274039 / GRB 241213A  - 2024-12-13 (T+10m06s to T+26m34s) Image below (2024-12-13.103) was taken 0.00029 - 0.00077 days after discovery of  GRB 241213A Position of GRB (not visible) is shown by white cross-hairs Non-Detection Limiting Magnitude +19.3 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 02:38 UT (#1282039-43) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

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

Assessment was that the imaging had successfully made an immediate post-GRB optical observation, but no optical counterpart was visible. The non-detection limiting magnitude was +19.3,  so any optical counterpart to the GRB  (if any) must be dimmer than this value.

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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 with SN 2024aakr - 2024-12-13 (T+41.7d) Image below (2024-12-13.088) was taken 41.7 days after discovery of 2024aakr Position of reported SN (not separately distinguishable, fading?) is indicated by white cross-hairs. Measured Magnitude +14.89 (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 2024-12-13 02:12 UT (#1282026-28) 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 4192A - Spiral Galaxy with Type II Supernova 2024exw

NGC 4192A with AT 2024exw (Coma Berenices) AT 2024exw (Type: II, z=0.007) discovered 2024-03-24.674 UT by Koichi Itagaki Alias: ATLAS24ekc Discovery Magnitude 15.9 (Clear Filter) vs Prior Non-Detection in DSS Image  ( TNS 2024exw )

NGC 4192A with SN 2024exw - 2024-12-13 (T+263.5d) Image below (2024-12-13.128) was taken 263.5 days after discovery of 2024exw Position of reported supernova (no longer visible) is shown by white cross-hairs Poor quality image (poor sky transparency, bright uneven background)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 03:14 UT (#1282064-68) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 4192A with SN 2024exw - Earlier Image,  2024-04-09 (T+16.3d) Image below (2024-04-09.976) was taken 16.3 days after discovery of 2024exw Position of reported supernova (distinct) is shown by white cross-hairs Measured Magnitude +15.19 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-04-09 23:34 UT (#1205006-10) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024exw (in NGC 4192A) on Supernova 2024 Page >>

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NGC 5151 - Spiral Galaxy with Type Ia Supernova 2024acnr

NGC 5151 with SN 2024acnr (Coma Berenices) SN 2024acnr (Type: Ia) discovered 2024-11-27.628 UT by ATLAS Alias: ATLAS24qrz, GOTO24iqt Discovery Magnitude 17.71 (cyan-ATLAS Filter) vs Prior Non-Detection Limiting Magnitude 18.13  ( TNS 2024acnr )

NGC 5151 - Spiral Galaxy

Annotated CCD Image (50% size, square root scale) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 04:26 UT (#1282090-94) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

NGC 5151 with SN 2024acnr - 2024-12-13 (T+15.6d) Image below (2024-12-13.178) was taken 15.6 days after discovery of 2024acnr Position of reported supernova (very faint) is shown by white cross-hairs Measured Magnitude +18.08 (Clear Filter)

Annotated CCD Image (150% size, square root scale, cropped) 5 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 04:26 UT (#1282090-94) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024acnr (in NGC 5151) on Supernova 2024 Page >>

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SN 2024adhf - Type Ia Supernova

SN 2024adhf (Crater) Alias: In WISEA J113009.86-134449.7 SN 2024adhf (Type: Ia) discovered 2024-12-01.269 UT by GOTO Alias: GOTO24iqy, ZTF24abuvknk, Gaia25aao Discovery Magnitude 14.9 (L-GOTO Filter) vs Prior Non-Detection Limiting Magnitude 18.9 Confirmed SN Ia Gaia, 2024-12-04 09:47, mag 14.08 Gaia, 2025-01-01 11:19, mag 14.45  ( TNS 2024acnr | Gaia25aao )

SN 2024adhf - 2024-12-13 (T+12.0d) Image below (2024-12-13.235) was taken 12.0 days after discovery of 2024adhf Position of reported supernova (distinct) is shown by white cross-hairs Estimated Magnitude +14.0 (Clear Filter) Not sufficiently separable from adjacent object for making a magnitude measurement in CCDSoft. Unclear if adjacent object is a star or is a galaxy (WISEA J113009.86-134449.7)

Annotated CCD Image (125% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 05:45 UT (#1282124-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

SN 2024adhf - Detail, 2024-12-13 (T+12.0d) Position of reported supernova (distinct) is shown by white cross-hairs Adjacent object is GSC 5515:838 (UCAC2 26890101) as possible star, but this also corresponds to catalog location of WISEA J113009.86-134449.7 (a galaxy)

Annotated CCD Image (250% size, square root scale, cropped) 4 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 05:45 UT (#1282124-27) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

SN 2024adhf - Reference Image PanSTARRS image shows presence of a faint spiral galaxy at location of SN 2024adhf Unclear if SN is associated with this faint galaxy or with galaxy  WISEA J113009.86-134449.7 (sitting at same position as GSC 5515:838)

PanSTARRS DR1 Color image displayed & captured in Aladin

Images of SN 2024adhf on Supernova 2024 Page >>

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UGC 5886 - Spiral Galaxy with Type IIn Supernova 2024hw

UGC 5886 with AT 2024hw (Sextans) AT 2024hw (Type: unk) discovered 2024-01-05.357 UT by ZTF Alias: ZTF24aaaibep Discovery Magnitude 17.394 (i-ZTF Filter)  ( TNS 2024hw )

UGC 5886 with SN 2024hw - 2024-12-13 (T+342.9d) Image below (2024-12-13.223) was taken 342.9 days after discovery of 2024hw Position of earlier supernova (very faint) is indicated by white cross-hairs. Estimated Magnitude +17.6 (Clear Filter) Poor quality image (uneven background gradient) Unable to generate gradient corrected, square root scaled image due to a bug in nebulosity

Annotated CCD Image (150% size, linear scale, cropped) 2 x 180s exposure (average combine), 3x3 binning, Clear Filter 2024-12-13 05:24 UT (#1282118-19) 12" LX200R (at f/10.4) + ST-10XME Auto-guided using TS 80mm APO, ZWO ASI178MC & PHD2

Images of SN 2024hw (in UGC 5886) on Supernova 2024 Page >>

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