RA/DEC (2000)
03:53:04.821 +35:35:10.37
58.2700878976 +35.5862147963
Type
SN II
Redshift
0.019
Discovery ReportClassification Report
Related AstroNotes: 2025-299
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-10-15 11:13:13.728
TNS AT
Y
Public
Y
Discovery Mag
18.424
Filter
cyan-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), M. R. Alarcón, J. Licandro, P. Nichita (IAC), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill, P. J. Broda (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025aant - 2025-10-21 02:54:25 LT / SPRAT (OxQUB)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),0 (observed)

Light curves

 ▌ATLAS-TDO_ATLAS-05_wide
 ▌GOTO-N_GOTO-2_L
 ▌PS2_GPC2_w
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-MLO_ATLAS-01_cyan
   
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
22271 2025-10-21 02:54:25 LT / SPRAT 1800 Robotic OxQUB tns_2025aant_2025-10-21_02-54-25.367_LT_SPRAT_OxQUB.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-10-14 02:23:54 - 2025-10-14 02:23:54 2460962.59993 - 2460962.59993 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
524092 2025-10-14 02:23:54 2460962.59993 20 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-2 2025-10-07 02:14:22 - 2025-10-25 00:44:47 2460955.593306 - 2460973.531097 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
526733 2025-10-25 00:44:47 2460973.531097 18.12 0.04 ABMag L-GOTO GOTO-N_GOTO-2 180
526732 2025-10-07 02:14:22 2460955.593306 18.7 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
w-P1 PS2_GPC2 2025-11-11 09:01:19 - 2025-11-11 09:01:19 2460990.87591 - 2460990.87591 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
546968 2025-11-11 09:01:19 2460990.87591 18.35 0.01 22 ABMag w-P1 PS2_GPC2 45 Robot
r-ZTF P48_ZTF-Cam 2025-10-12 10:02:32 - 2025-10-12 10:02:32 2460960.9184259 - 2460960.9184259 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
524197 2025-10-12 10:02:32 2460960.9184259 20.1845 0.143564 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-10-08 09:44:42 - 2025-10-16 09:12:48 2460956.9060417 - 2460964.8838889 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
524198 2025-10-16 09:12:48 2460964.8838889 18.4896 0.0968792 ABMag g-ZTF P48_ZTF-Cam
524196 2025-10-08 09:44:42 2460956.9060417 19.4426 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
cyan-ATLAS ATLAS-MLO_ATLAS-01 2025-10-15 11:13:14 - 2025-10-15 11:13:14 2460963.96752 - 2460963.96752 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
524093 2025-10-15 11:13:14 2460963.96752 18.424 0.109 19.16 ABMag cyan-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
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
285643 2026-01-02 00:23:46 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 03:53:04.821 +35:35:10.37 2025-11-11 09:01:18.624 18.35 w-P1 PSN PS25mou Pan-STARRS N
274744 2025-10-25 09:58:33 GOTO_bot D. O'Neill, G. Ramsay, K. Ackley et al. GOTO GOTO 03:53:04.847 +35:35:10.34 2025-10-25 00:44:47.040 18.12 L-GOTO Other GOTO25jep GOTO N
273540 2025-10-16 09:55:47 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 03:53:04.830 +35:35:10.16 2025-10-12 10:02:31.997 20.1845 r-ZTF PSN ZTF25abxdlzo ZTF N
273481 2025-10-15 16:53:27 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 03:53:04.829 +35:35:10.48 2025-10-15 11:13:13.728 18.424 cyan-ATLAS PSN ATLAS25msz ATLAS 2025TNSTR4129....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22271 2025-10-22 22:34:32 Shubham Srivastav S. Srivastav (Oxford), M. Fulton, M. Nicholl, C. R. Angus, K. W. Smith, D. R. Young, A. Aamer, D. Magill, T. Moore, X. Sheng, S. A. Sim (QUB), S. J. Smartt (Oxford/QUB), J. H. Gillanders, H. F. Stevance, F. Stoppa (Oxford), T.-W. Chen (NCU) OxQUB SN II 0.019 1 OxQUB Low S/N spectrum shows hint of broad H-alpha and H-beta. ATLAS and ZTF light curves have flattened, which taken together suggests a IIP supernova. 2025TNSCR4247....1S
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
22271 2025-10-21 02:54:25 LT / SPRAT 1800 Robotic OxQUB tns_2025aant_2025-10-21_02-54-25.367_LT_SPRAT_OxQUB.txt Object

Comments

TNS
System

Fri, 01/02/2026 - 00:23

Object coordinates updated

Object coordinates updated according to AT-report 285643 of Group Pan-STARRS
Previous RA, DEC: 03:53:04.830, +35:35:10.16 (58.2701235, +35.5861556)
Updated RA, DEC: 03:53:04.821, +35:35:10.37 (58.2700878976, +35.5862147963)

TNS
System

Thu, 10/16/2025 - 09:55

Object coordinates updated

Object coordinates updated according to AT-report 273540 of Group ZTF
Previous RA, DEC: 03:53:04.829, +35:35:10.48 (58.2701195455, +35.586245)
Updated RA, DEC: 03:53:04.830, +35:35:10.16 (58.2701235, +35.5861556)