RA/DEC (2000)
00:42:14.654 +41:17:28.08
10.5610581 +41.2911343
Type
Nova
Redshift
0
Discovery ReportClassification Report
Reporting Group
None
Discovering Data Source
None
Discovery Date
2025-12-11 18:35:24.576
TNS AT
Y
Public
Y
Host Name
M31
Discovery Mag
19.4
Filter
Clear-
Reporter/s
Róbert Fidrich
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025agmm - 2025-12-20 20:48:00 BL41 / FOSC-E5535 (None)z=
▌Show H at z=vexp= km/s
▌Show He at z=vexp= km/s
▌Show He II at z=vexp= km/s
▌Show C II at z=vexp= km/s
▌Show C III at z=vexp= km/s
▌Show C IV at z=vexp= km/s
▌Show N II at z=vexp= km/s
▌Show N III at z=vexp= km/s
▌Show N IV at z=vexp= km/s
▌Show N V at z=vexp= km/s
▌Show O at z=vexp= km/s
▌Show [O I] at z=vexp= km/s
▌Show O II at z=vexp= km/s
▌Show [O II] at z=vexp= km/s
▌Show [O III] at z=vexp= km/s
▌Show O V at z=vexp= km/s
▌Show O VI at z=vexp= km/s
▌Show Na at z=vexp= km/s
▌Show Mg at z=vexp= km/s
▌Show Mg II at z=vexp= km/s
▌Show Si II at z=vexp= km/s
▌Show S II at z=vexp= km/s
▌Show Ca II at z=vexp= km/s
▌Show [Ca II] at z=vexp= km/s
▌Show Fe II at z=vexp= km/s
▌Show Fe III at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Tellurics 
▌Show Galaxy lines at z=
▌Show WR-WN at z=vexp= km/s
▌Show WR-WC/O at z=vexp= km/s
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),

Light curves

 ▌GOTO-N_GOTO-2_L
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌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
22651 2025-12-20 20:48:00 BL41 / FOSC-E5535 2400 Claudio Balcon Claudio Balcon None tns_2025agmm_2025-12-20_20-48-00_BL41_FOSC-E5535_None.dat tns_2025agmm_2025-12-20_20-48-00_BL41_FOSC-E5535_None.fit Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-12-06 21:02:23 - 2025-12-20 20:27:54 2461016.376653 - 2461030.352713 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
541949 2025-12-20 20:27:54 2461030.352713 17.55 0.08 ABMag L-GOTO GOTO-N_GOTO-2 180
541948 2025-12-06 21:02:23 2461016.376653 18.5 ABMag L-GOTO GOTO-N_GOTO-2 135 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-12-11 05:11:46 - 2025-12-13 02:50:18 2461020.7165046 - 2461022.6182639 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
538262 2025-12-13 02:50:18 2461022.6182639 17.0754 0.0119426 ABMag r-ZTF P48_ZTF-Cam
538261 2025-12-11 05:11:46 2461020.7165046 20.4566 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-12-13 03:38:15 - 2025-12-13 03:38:15 2461022.6515625 - 2461022.6515625 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
538263 2025-12-13 03:38:15 2461022.6515625 16.944 0.0448207 ABMag g-ZTF P48_ZTF-Cam
Clear- Other_Other 2025-12-09 05:06:28 - 2025-12-12 05:07:49 2461018.7128227 - 2461021.7137566 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
537928 2025-12-12 05:07:49 2461021.7137566 18.3 0.15 19.8 VegaMag Clear- Other_Other 360 Robert Fidrich 3x120s co-added images made with the 0.61-m f/6.5 CDK reflector, Sierra Remote Observatory at Auberry California USA
537927 2025-12-11 18:35:25 2461021.2745934 19.4 0.15 20 VegaMag Clear- Other_Other 960 Robert Fidrich Róbert Fidrich and Tamás Tordai (HAA/VSS) report the discovery of a new astronomical transient. Discovered using 4x90s co-added images made with a 0.43 m Dall-Kirkham telescope at Alnitak Remote Observatory, Sierra del Segura, SpaiN, with Luminance filter. More info: https://vendegcsillagkereso.blogspot.com/2025/12/vend78-possible-young-nova-in-m31.html The discovery was made using the Alnitak Remote Observatories robotic telescope network, ARTA program.
537926 2025-12-09 05:06:28 2461018.7128227 19.5 VegaMag Clear- Other_Other 360 Robert Fidrich [Last non detection] 8x120s images made remotely with a Luminance filter on a 0.51m telescope Utah Desert Remote Observatory at Great Basin Desert, Beryl Junction, Utah, USA (iTelescope,net network).
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
281972 2025-12-22 20:57:11 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 00:42:14.664 +41:17:28.12 2025-12-20 20:27:54.144 17.55 L-GOTO Other GOTO25mgy GOTO N
280303 2025-12-13 04:05:57 BTSbot_bot Nabeel Rehemtulla (CIERA,NU),Wynn Jacobson-Galán (Caltech) et al. ZTF ZTF 00:42:14.654 +41:17:28.08 2025-12-13 02:50:18.000 17.0754 r-ZTF PSN ZTF25achdubq ZTF Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167). N
280183 2025-12-12 06:14:04 Róbert Fidrich Róbert Fidrich et al. 00:42:14.760 +41:17:28.40 2025-12-11 18:35:24.576 19.4 Clear- PNV M31 Vend78 Róbert Fidrich and Tamás Tordai (HAA/VSS) report the discovery of a new astronomical transient. Discovered using 4x90s co-added images made with a 0.43 m Dall-Kirkham telescope at Alnitak Remote Observatory, Sierra del Segura, SpaiN, with Luminance filter. More info: https://vendegcsillagkereso.blogspot.com/2025/12/vend78-possible-young-nova-in-m31.html The discovery was made using the Alnitak Remote Observatories robotic telescope network, ARTA program. 2025TNSTR4939....1F N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22650 2025-12-20 21:16:14 Claudio Balcon Claudio Balcon (Belluno A.O. ISSP) None Nova 0 1 The spectrum resembles that of a Nova in M31. 2025TNSCR5094....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
22651 2025-12-20 20:48:00 BL41 / FOSC-E5535 2400 Claudio Balcon Claudio Balcon None tns_2025agmm_2025-12-20_20-48-00_BL41_FOSC-E5535_None.dat tns_2025agmm_2025-12-20_20-48-00_BL41_FOSC-E5535_None.fit Object

Comments

TNS
System

Sat, 12/13/2025 - 04:05

Object coordinates updated

Object coordinates updated according to AT-report 280303 of Group ZTF
Previous RA, DEC: 00:42:14.760, +41:17:28.40 (10.5615, +41.291222)
Updated RA, DEC: 00:42:14.654, +41:17:28.08 (10.5610581, +41.2911343)