RA/DEC (2000)
00:23:50.051 -00:18:08.61
5.95854608637 -0.302390479282
Type
SN II
Redshift
0.0428
Discovery ReportClassification Report
Related AstroNotes: 2025-269, 2025-281
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-08-28 02:18:55.008
TNS AT
Y
Public
Y
Discovery Mag
19.07
Filter
L-GOTO
Reporter/s
M. Pursiainen, G. Ramsay, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, D. O'Neill, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025vrr - 2025-09-03 04:03:05 NOT / ALFOSC (GOTO)z=
 ▌SN_2025vrr - 2025-08-28 03:54:05 NOT / ALFOSC (GOTO)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
 ▌ATLAS-STH_ATLAS-03_cyan
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_g
 ▌PS1_GPC1_w
   
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
21957 2025-09-03 04:03:05 NOT / ALFOSC I. Worssam, M. Pursiainen I. Worssam, M. Pursiainen GOTO tns_2025vrr_2025-09-03_04-03-05.303_NOT_ALFOSC_GOTO.dat Object
21900 2025-08-28 03:54:05 NOT / ALFOSC M. Pursiainen, I. Worssam M. Pursiainen, I. Worssam GOTO tns_2025vrr_2025-08-28_03-54-04.576_NOT_ALFOSC_GOTO.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-08-22 01:14:48 - 2025-08-22 01:14:48 2460909.55194 - 2460909.55194 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
514789 2025-08-22 01:14:48 2460909.55194 19.43 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
cyan-ATLAS ATLAS-STH_ATLAS-03 2025-08-29 22:52:43 - 2025-08-29 22:52:43 2460917.45328 - 2460917.45328 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
514790 2025-08-29 22:52:43 2460917.45328 18.958 0.137 19.69 ABMag cyan-ATLAS ATLAS-STH_ATLAS-03 30 Robot
L-GOTO GOTO-N_GOTO-1 2025-08-27 02:25:20 - 2025-08-28 02:18:55 2460914.60093 - 2460915.596469 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
512976 2025-08-28 02:18:55 2460915.596469 19.07 0.15 ABMag L-GOTO GOTO-N_GOTO-1 180
512975 2025-08-27 02:25:20 2460914.60093 19.6 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
g-ZTF P48_ZTF-Cam 2025-09-14 08:16:54 - 2025-09-23 08:09:31 2460932.8450694 - 2460941.8399421 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519309 2025-09-23 08:09:31 2460941.8399421 18.9964 0.0391095 ABMag g-ZTF P48_ZTF-Cam
519308 2025-09-14 09:50:11 2460932.9098495 18.6875 0.076115 ABMag g-ZTF P48_ZTF-Cam
519307 2025-09-14 08:16:54 2460932.8450694 20.1844 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
w-P1 PS1_GPC1 2025-08-29 12:20:03 - 2025-08-29 12:20:03 2460917.01392 - 2460917.01392 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
516548 2025-08-29 12:20:03 2460917.01392 19.18 0.05 22 ABMag w-P1 PS1_GPC1 45 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
271017 2025-09-23 10:13:55 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 00:23:50.054 -00:18:08.51 2025-09-14 09:50:10.996 18.6875 g-ZTF PSN ZTF25abqpjvm ZTF N
269762 2025-09-11 20:47:15 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 00:23:50.051 -00:18:08.61 2025-08-29 12:20:02.688 19.18 w-P1 PSN PS25hlf Pan-STARRS N
268880 2025-09-01 09:18:51 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 00:23:50.045 -00:18:08.74 2025-08-29 22:52:43.392 18.958 cyan-ATLAS PSN ATLAS25kvo ATLAS N
267959 2025-08-28 07:09:34 GOTO_bot M. Pursiainen,G. Ramsay,K. Ackley et al. GOTO GOTO 00:23:50.050 -00:18:08.98 2025-08-28 02:18:55.008 19.07 L-GOTO Other GOTO25gkn GOTO 2025TNSTR3416....1P N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21957 2025-09-03 10:12:50 David O'Neill I. Worssam, M. Pursiainen, T. Killestein, J. Lyman, D. O'Neill, K. Ackley, M. Dyer, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, A. Kumar on behalf of GOTO collaboration GOTO SN II 0.0428 1 GOTO The spectrum was classified using template matching with SNID-SAGE. It exhibits a blue continuum with P-Cygni features consistent with the H Balmer series. Therefore the object is most likely a young Type II SN. The redshift estimated from template matching (z = 0.04) is consistent with the nearby (offset ~12.7") galaxy 2MASX J00234929-0018031, indicating it is the likely host. The redshift reported here is that of the galaxy. 2025TNSCR3544....1W
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
21957 2025-09-03 04:03:05 NOT / ALFOSC I. Worssam, M. Pursiainen I. Worssam, M. Pursiainen GOTO tns_2025vrr_2025-09-03_04-03-05.303_NOT_ALFOSC_GOTO.dat Object
21900 2025-08-28 10:19:39 Joe Lyman I. Worssam, M. Pursiainen, D. O'Neill, J. Lyman, T. Killestein, K. Ackley, M. Dyer, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, A. Kumar on behalf of GOTO collaboration GOTO SN 0.04 1 GOTO Blue continuum with no evidence of broad features. Small narrow bumps at Halpha and Hbeta seen at a common redshift of 0.04. Good agreement with spectroscopic redshift of large galaxy to the West (z=0.04277). Absolute magnitude consistent with a SN. 2025TNSCR3426....1W
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
21900 2025-08-28 03:54:05 NOT / ALFOSC M. Pursiainen, I. Worssam M. Pursiainen, I. Worssam GOTO tns_2025vrr_2025-08-28_03-54-04.576_NOT_ALFOSC_GOTO.dat Object

Comments

TNS
System

Thu, 09/11/2025 - 20:47

Object coordinates updated

Object coordinates updated according to AT-report 269762 of Group Pan-STARRS
Previous RA, DEC: 00:23:50.045, -00:18:08.74 (5.95852130435, -0.302428695652)
Updated RA, DEC: 00:23:50.051, -00:18:08.61 (5.95854608637, -0.302390479282)

TNS
System

Mon, 09/01/2025 - 09:18

Object coordinates updated

Object coordinates updated according to AT-report 268880 of Group ATLAS
Previous RA, DEC: 00:23:50.050, -00:18:08.98 (5.958542, -0.302494)
Updated RA, DEC: 00:23:50.045, -00:18:08.74 (5.95852130435, -0.302428695652)