RA/DEC (2000)
00:42:48.636 +41:13:51.14
10.702648 +41.2308717
Type
Nova
Redshift
0
Discovery ReportClassification Report
Reporting Group
ROTS
Discovering Data Source
None
Discovery Date
2025-07-10 03:09:44.064
TNS AT
Y
Public
Y
Host Name
M31
Discovery Mag
17.99
Filter
Clear-
Reporter/s
Jingyuan Zhao
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025qsm - 2025-07-20 01:22:00 BL41 / FOSC-E5535 (None)z=
▌Show H at z=vexp= km/s
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),

Light curves

 ▌ATLAS-TDO_ATLAS-05_wide
 ▌GOTO-N_GOTO-2_L
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_i
 ▌P48_ZTF-Cam_g
 ▌ATLAS-MLO_ATLAS-01_orange
 ▌Other_Other_Clear
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
 ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
21582 2025-07-20 01:22:00 BL41 / FOSC-E5535 1200 Claudio Balcon Claudio Balcon None tns_2025qsm_2025-07-20_01-22-00_BL41_FOSC-E5535_None.dat tns_2025qsm_2025-07-20_01-22-00_BL41_FOSC-E5535_None.fit Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-07-11 01:50:48 - 2025-07-11 01:50:48 2460867.57694 - 2460867.57694 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
502788 2025-07-11 01:50:48 2460867.57694 17.297 0.101 17.77 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
L-GOTO GOTO-N_GOTO-2 2025-07-10 02:51:16 - 2025-07-10 02:51:16 2460866.618942 - 2460866.618942 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
502443 2025-07-10 02:51:16 2460866.618942 17.9 ABMag L-GOTO GOTO-N_GOTO-2 90 [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-07-13 04:46:29 - 2025-07-13 04:46:29 2460869.698955 - 2460869.698955 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
502444 2025-07-13 04:46:29 2460869.698955 16.78 0.07 ABMag L-GOTO GOTO-N_GOTO-1 180
i-ZTF P48_ZTF-Cam 2025-07-14 09:16:20 - 2025-08-05 08:26:30 2460870.8863426 - 2460892.8517361 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507678 2025-08-05 08:26:30 2460892.8517361 18.7889 0.104105 ABMag i-ZTF P48_ZTF-Cam
507677 2025-07-14 09:16:20 2460870.8863426 16.6501 0.0499114 ABMag i-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-06-27 11:14:18 - 2025-06-27 11:14:18 2460853.9682639 - 2460853.9682639 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507676 2025-06-27 11:14:18 2460853.9682639 20.0806 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2025-07-09 14:19:52 - 2025-07-09 14:19:52 2460866.09713 - 2460866.09713 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
502787 2025-07-09 14:19:52 2460866.09713 19.12 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
Clear- Other_Other 2025-07-08 01:39:42 - 2025-07-16 02:10:23 2460864.56924 - 2460872.59054 6
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
502858 2025-07-16 02:10:23 2460872.59054 16.61 VegaMag Clear- Other_Other 400 Jingyuan Zhao Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope, exposured 2×200s with Clear filter.
502859 2025-07-15 03:23:53 2460871.64158 16.66 VegaMag Clear- Other_Other 400 Jingyuan Zhao Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope, exposured 2×200s with Clear filter.
502860 2025-07-12 03:26:48 2460868.64361 16.75 VegaMag Clear- Other_Other 200 Jingyuan Zhao Image obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope, exposured 200s with Clear filter.
502861 2025-07-11 01:39:12 2460867.56889 17.31 VegaMag Clear- Other_Other 400 Jingyuan Zhao Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope, exposured 2×200s with Clear filter.
501682 2025-07-10 03:09:44 2460866.63176 17.99 19 VegaMag Clear- Other_Other 200 Jingyuan Zhao Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope at Alnitak Remote Observatories in Nerpio, Spain, exposured 200s with Clear filter.
501681 2025-07-08 01:39:42 2460864.56924 20 VegaMag Clear- Other_Other 400 Jingyuan Zhao [Last non detection] Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope at Alnitak Remote Observatories in Nerpio, Spain, exposured 2×200s with Clear filter.
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
265164 2025-08-06 22:38:40 Fritz Daniel Perley (LJMU),Christoffer Fremling (Caltech),Theophile du Laz (Caltech) on behalf of ZTF et al. ZTF ZTF 00:42:48.636 +41:13:51.14 2025-07-14 09:16:20.000 16.6501 i-ZTF PSN ZTF25abbgzpf ZTF N
262686 2025-07-16 09:22:25 Jingyuan Zhao Jingyuan Zhao et al. ROTS 00:42:48.630 +41:13:51.30 2025-07-16 02:10:22.656 16.61 Clear- PNV Follow-up observation for AT 2025qsm. Observations were made using Alnitak Remote Observatories robotic telescope network, Alnitak Research Telescope Access (ARTA) program. N
262641 2025-07-15 13:33:10 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 00:42:48.631 +41:13:51.10 2025-07-11 01:50:47.616 17.297 wide-ATLAS PSN ATLAS25hqv ATLAS N
262449 2025-07-14 12:38:12 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 00:42:48.631 +41:13:51.11 2025-07-13 04:46:29.280 16.78 L-GOTO Other GOTO25evz GOTO N
261981 2025-07-10 04:41:24 Jingyuan Zhao Jingyuan Zhao et al. ROTS 00:42:48.630 +41:13:51.30 2025-07-10 03:09:44.064 17.99 Clear- 1 PNV M31 Jingyuan Zhao report discovery of a possible nova in M31. Images obtained by 0.43-m f/6.8 Corrected Dall-Kirkham robotic telescope at Alnitak Remote Observatories in Nerpio, Spain, exposured 200s with Clear filter, around 2025 July 10.13176 UT, mag = 17.99 CV. Observations were made using Alnitak Remote Observatories robotic telescope network, Alnitak Research Telescope Access (ARTA) program. 2025TNSTR2640....1Z N
Related files
File Comments Last Modified (UT) Modified By
tns_2025qsm_atrep_261981.png Discovery Image 2025-07-10 10:04:13 Jingyuan Zhao
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21582 2025-07-20 02:13:10 Claudio Balcon Claudio Balcon (Belluno A.O. ISSP) None Nova 0 1 The spectrum shows strong Balmer lines and Fe ll “forest” emissions, features compatible with a Nova in M31 2025TNSCR2792....1B
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
21582 2025-07-20 01:22:00 BL41 / FOSC-E5535 1200 Claudio Balcon Claudio Balcon None tns_2025qsm_2025-07-20_01-22-00_BL41_FOSC-E5535_None.dat tns_2025qsm_2025-07-20_01-22-00_BL41_FOSC-E5535_None.fit Object

Comments

TNS
System

Wed, 08/06/2025 - 22:38

Object coordinates updated

Object coordinates updated according to AT-report 265164 of Group ZTF
Previous RA, DEC: 00:42:48.631, +41:13:51.10 (10.70263, +41.2308602128)
Updated RA, DEC: 00:42:48.636, +41:13:51.14 (10.702648, +41.2308717)

TNS
System

Tue, 07/15/2025 - 13:33

Object coordinates updated

Object coordinates updated according to AT-report 262641 of Group ATLAS
Previous RA, DEC: 00:42:48.631, +41:13:51.11 (10.70263, +41.230865)
Updated RA, DEC: 00:42:48.631, +41:13:51.10 (10.70263, +41.2308602128)

TNS
System

Mon, 07/14/2025 - 12:38

Object coordinates updated

Object coordinates updated according to AT-report 262449 of Group GOTO
Previous RA, DEC: 00:42:48.630, +41:13:51.30 (10.702625, +41.230917)
Updated RA, DEC: 00:42:48.631, +41:13:51.11 (10.70263, +41.230865)