RA/DEC (2000)
03:06:07.048 -39:01:58.49
46.5293670297 -39.0329143772
Type
SN Ia
Redshift
0.02
Discovery ReportClassification Report
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-09-22 05:44:38.112
TNS AT
Y
Public
Y
Discovery Mag
18.483
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_2025ygq - 2025-09-24 16:37:56 ANU-2.3m / WiFeS (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),0 (observed)

Light curves

 ▌GOTO-S_GOTO-4_L
 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-CHL_ATLAS-04_cyan
 ▌ATLAS-STH_ATLAS-03_orange
 ▌PS1_GPC1_i
   
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
22130 2025-09-24 16:37:56 ANU-2.3m / WiFeS 1800 B. Schmidt K. Auchettl None tns_2025ygq_2025-09-24_16-37-56_ANU-2.3m_WiFeS_None.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-09-17 16:21:16 - 2025-09-17 16:21:16 2460936.181434 - 2460936.181434 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519912 2025-09-17 16:21:16 2460936.181434 19.9 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
L-GOTO GOTO-S_GOTO-3 2025-09-24 14:55:25 - 2025-09-24 14:55:25 2460943.12182 - 2460943.12182 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519913 2025-09-24 14:55:25 2460943.12182 17.58 0.02 ABMag L-GOTO GOTO-S_GOTO-3 360
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-09-22 05:44:38 - 2025-09-22 05:44:38 2460940.73933 - 2460940.73933 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519160 2025-09-22 05:44:38 2460940.73933 18.483 0.113 19.35 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2025-09-20 23:41:49 - 2025-09-20 23:41:49 2460939.48737 - 2460939.48737 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
519159 2025-09-20 23:41:49 2460939.48737 19.4 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
i-P1 PS1_GPC1 2025-10-05 11:52:43 - 2025-10-05 11:52:43 2460953.99494 - 2460953.99494 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
563802 2025-10-05 11:52:43 2460953.99494 16.38 0.02 20.7 ABMag i-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
294083 2026-03-10 11:26:45 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 03:06:07.048 -39:01:58.49 2025-10-05 11:52:42.816 16.38 i-P1 PSN PS26aqx Pan-STARRS N
271290 2025-09-25 09:31:57 GOTO_bot D. O'Neill, M. Kennedy, K. Ackley et al. GOTO GOTO 03:06:07.043 -39:01:58.48 2025-09-24 14:55:25.248 17.58 L-GOTO Other GOTO25hqm GOTO This transient was discovered with the assistance of the GOTO Kilonova Seekers Citizen Scientists on Zooniverse. The candidate was flagged by volunteers: Henryk Krawczyk, Jose Alberto da Silva Campos, Cledison Marcos da Silva, Rosemary Billington, M.T. Mazzucato N
270946 2025-09-22 08:54:04 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 03:06:07.046 -39:01:58.25 2025-09-22 05:44:38.112 18.483 cyan-ATLAS PSN ATLAS25lub ATLAS 2025TNSTR3804....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
22130 2025-10-01 00:40:42 Brian Schmidt B. Schmidt (ANU), K. Auchettl (University of Melbourne/UCSC), C. Lidman (ANU), B. Martin (ANU), Anais Moller (Swinburne), L. Rauf (ANU), Sara Romagnoli (University of Melbourne), Jennifer Shi (University of Melbourne), and B. E. Tucker (ANU) None SN Ia 0.02 1 Classified as SN Ia with SNID-SAGE ~5 days before max 2025TNSCR3955....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
22130 2025-09-24 16:37:56 ANU-2.3m / WiFeS 1800 B. Schmidt K. Auchettl None tns_2025ygq_2025-09-24_16-37-56_ANU-2.3m_WiFeS_None.dat Object

Comments

TNS
System

Tue, 03/10/2026 - 11:26

Object coordinates updated

Object coordinates updated according to AT-report 294083 of Group Pan-STARRS
Previous RA, DEC: 03:06:07.046, -39:01:58.25 (46.5293577778, -39.0328466667)
Updated RA, DEC: 03:06:07.048, -39:01:58.49 (46.5293670297, -39.0329143772)