RA/DEC (2000)
04:30:08.733 -23:38:02.04
67.5363886667 -23.6338996667
Type
SN Ia
Redshift
0.09
Discovery ReportClassification Report
Related AstroNotes: 2025-273
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-08-17 16:51:36.864
TNS AT
Y
Public
Y
Discovery Mag
18.9
Filter
L-GOTO
Reporter/s
A. Kumar, D. O'Neill, K. Ackley, M. Dyer, J. Lyman, 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, T. Killestein, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025vcj - 2025-08-29 05:23:32 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

 ▌GOTO-S_GOTO-4_L
 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌ATLAS-STH_ATLAS-03_orange
   
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
21904 2025-08-29 05:23:32 NOT / ALFOSC I. Worssam, M. Pursiainen I. Worssam, M. Pursiainen GOTO tns_2025vcj_2025-08-29_05-23-32.207_NOT_ALFOSC_GOTO.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-08-17 16:51:37 - 2025-08-17 16:51:37 2460905.202512 - 2460905.202512 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
511590 2025-08-17 16:51:37 2460905.202512 18.9 0.1 ABMag L-GOTO GOTO-S_GOTO-4 180
L-GOTO GOTO-S_GOTO-3 2025-07-24 19:49:17 - 2025-07-24 19:49:17 2460881.32589 - 2460881.32589 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
511589 2025-07-24 19:49:17 2460881.32589 19 ABMag L-GOTO GOTO-S_GOTO-3 360 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-08-10 08:37:02 - 2025-08-10 08:37:02 2460897.85905 - 2460897.85905 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
513717 2025-08-10 08:37:02 2460897.85905 18.35 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
orange-ATLAS ATLAS-STH_ATLAS-03 2025-08-17 00:25:26 - 2025-08-17 00:25:26 2460904.51766 - 2460904.51766 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
513718 2025-08-17 00:25:26 2460904.51766 19.031 0.129 19.75 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 110 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
268367 2025-08-29 09:13:02 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 04:30:08.733 -23:38:02.04 2025-08-17 00:25:25.824 19.031 orange-ATLAS PSN ATLAS25krs ATLAS N
267256 2025-08-23 10:40:36 GOTO_bot A. Kumar,D. O'Neill,K. Ackley et al. GOTO GOTO 04:30:08.761 -23:38:01.51 2025-08-17 16:51:36.864 18.9 L-GOTO Other GOTO25gee GOTO This transient was discovered with the assistance of the GOTO Kilonova Seekers Citizen Scientists on Zooniverse. The candidate was flagged by volunteers: M.T. Mazzucato, Íris Eduarda Forcel Roncada, Rachel A. Ford, Cledison Marcos da Silva, Virgilio Gonano 2025TNSTR3333....1K N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21904 2025-08-29 10:36:17 David O'Neill I. Worssam, M. Pursiainen, J. Lyman, D. O'Neill, 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 Ia 0.09 1 GOTO Classified using template matching with SNID-SAGE. 2025TNSCR3449....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
21904 2025-08-29 05:23:32 NOT / ALFOSC I. Worssam, M. Pursiainen I. Worssam, M. Pursiainen GOTO tns_2025vcj_2025-08-29_05-23-32.207_NOT_ALFOSC_GOTO.dat Object

Comments

TNS
System

Fri, 08/29/2025 - 09:13

Object coordinates updated

Object coordinates updated according to AT-report 268367 of Group ATLAS
Previous RA, DEC: 04:30:08.761, -23:38:01.51 (67.536503, -23.633752)
Updated RA, DEC: 04:30:08.733, -23:38:02.04 (67.5363886667, -23.6338996667)