RA/DEC (2000)
00:42:20.380 +41:14:20.81
10.5849169 +41.2391126
Type
Nova
Redshift
0
Discovery ReportClassification Report
Reporting Group
XOSS
Discovering Data Source
XOSS
Discovery Date
2025-12-16 12:40:15.744
TNS AT
Y
Public
Y
Host Name
M31
Discovery Mag
17.6
Filter
Clear-
Reporter/s
Jianlin Xu, Mi Zhang, Ziyang Mai, Hualin Li, Yanxi Li, Wenjie Zhou, Jingyuan Zhao, Guoyou Sun, Jiangao Ruan, Xing Gao, on behalf of the PSP team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025ahch - 2025-12-20 21:42:00 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
22652 2025-12-20 21:42:00 BL41 / FOSC-E5535 1800 Claudio Balcon Claudio Balcon None tns_2025ahch_2025-12-20_21-42-00_BL41_FOSC-E5535_None.dat tns_2025ahch_2025-12-20_21-42-00_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
541177 2025-12-20 20:27:54 2461030.352713 17.31 0.08 ABMag L-GOTO GOTO-N_GOTO-2 180
541176 2025-12-06 21:02:23 2461016.376653 18.1 ABMag L-GOTO GOTO-N_GOTO-2 135 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-12-15 03:49:21 - 2025-12-17 02:48:41 2461024.6592708 - 2461026.6171412 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
540777 2025-12-17 02:48:41 2461026.6171412 16.5972 0.0529674 ABMag r-ZTF P48_ZTF-Cam
540776 2025-12-15 03:49:21 2461024.6592708 20.3527 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-12-19 04:17:32 - 2025-12-19 04:17:32 2461028.6788426 - 2461028.6788426 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
540778 2025-12-19 04:17:32 2461028.6788426 16.4776 0.03542 ABMag g-ZTF P48_ZTF-Cam
Clear- Other_Other 2025-12-16 12:40:16 - 2025-12-16 12:40:16 2461026.02796 - 2461026.02796 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
539373 2025-12-16 12:40:16 2461026.02796 17.6 19.5 VegaMag Clear- Other_Other 60 Xing Gao
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
281661 2025-12-20 21:28:25 GOTO_bot G. Ramsay, K. Ackley, M. Dyer et al. GOTO GOTO 00:42:20.397 +41:14:20.74 2025-12-20 20:27:54.144 17.31 L-GOTO Other GOTO25mfd GOTO N
281479 2025-12-19 16:59:20 Fritz Nabeel Rehemtulla (CIERA, NU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 00:42:20.380 +41:14:20.81 2025-12-17 02:48:40.999 16.5972 r-ZTF PSN ZTF25aciedoz ZTF N
280838 2025-12-16 13:09:59 XOSS_Bot0 Jianlin Xu, Mi Zhang, Ziyang Mai et al. XOSS XOSS 00:42:20.660 +41:14:21.20 2025-12-16 12:40:15.744 17.6 Clear- PNV M31 PSP25W XOSS Nova candidate classified by XOSS. Details can be found at http://xjltp.china-vo.org/psp25w.html 2025TNSTR5001....1X N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22651 2025-12-20 22:06:06 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
22652 2025-12-20 21:42:00 BL41 / FOSC-E5535 1800 Claudio Balcon Claudio Balcon None tns_2025ahch_2025-12-20_21-42-00_BL41_FOSC-E5535_None.dat tns_2025ahch_2025-12-20_21-42-00_BL41_FOSC-E5535_None.fit Object

Comments

TNS
System

Fri, 12/19/2025 - 16:59

Object coordinates updated

Object coordinates updated according to AT-report 281479 of Group ZTF
Previous RA, DEC: 00:42:20.660, +41:14:21.20 (10.586083, +41.239222)
Updated RA, DEC: 00:42:20.380, +41:14:20.81 (10.5849169, +41.2391126)