RA/DEC (2000)
03:34:49.928 -09:50:33.58
53.7080346154 -9.84266
Type
SN Ia
Redshift
0.031882
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-09-07 05:45:19.584
TNS AT
Y
Public
Y
Discovery Mag
18.63
Filter
L-GOTO
Reporter/s
G. Ramsay, D. O'Neill, 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, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025xaz - 2025-09-09 00:00:00 NOT / ALFOSC (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

 ▌ATLAS-TDO_ATLAS-05_wide
 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-STH_ATLAS-03_orange
 ▌GOTO-N_GOTO-1_L
   
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
22008 2025-09-09 00:00:00 NOT / ALFOSC Pyykkinen N. Pyykkinen N. None tns_2025xaz_2025-09-09_NOT_ALFOSC_None.dat tns_2025xaz_2025-09-09_NOT_ALFOSC_None.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-09-11 02:34:56 - 2025-09-11 02:34:56 2460929.60759 - 2460929.60759 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
516523 2025-09-11 02:34:56 2460929.60759 17.199 0.157 18.59 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
L-GOTO GOTO-S_GOTO-3 2025-09-02 17:26:17 - 2025-09-02 17:26:17 2460921.22658 - 2460921.22658 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
516016 2025-09-02 17:26:17 2460921.22658 19.8 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
orange-ATLAS ATLAS-STH_ATLAS-03 2025-09-10 00:52:23 - 2025-09-10 00:52:23 2460928.53638 - 2460928.53638 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
516522 2025-09-10 00:52:23 2460928.53638 17.92 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-09-07 05:45:20 - 2025-09-07 05:45:20 2460925.739815 - 2460925.739815 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
516017 2025-09-07 05:45:20 2460925.739815 18.63 0.13 ABMag L-GOTO GOTO-N_GOTO-1 180
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
269746 2025-09-11 15:02:22 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 03:34:49.928 -09:50:33.58 2025-09-11 02:34:55.776 17.199 wide-ATLAS PSN ATLAS25lep ATLAS N
269479 2025-09-07 09:25:24 GOTO_bot G. Ramsay, D. O'Neill, K. Ackley et al. GOTO GOTO 03:34:49.955 -09:50:32.98 2025-09-07 05:45:19.584 18.63 L-GOTO Other GOTO25gwl 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, Svetoslav Alexandrov, Henryk Krawczyk, Virgilio Gonano, Ryan Cardinale 2025TNSTR3599....1R N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22008 2025-09-11 14:51:50 Niko Pyykkinen N. Pyykkinen (NOT/UTU) None SN Ia 0.031882 1 Observed on the night of 09.09.2025 on the Nordic Optical Telescope with ALFOSC instrument. 2025TNSCR3659....1N
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
22008 2025-09-09 00:00:00 NOT / ALFOSC Pyykkinen N. Pyykkinen N. None tns_2025xaz_2025-09-09_NOT_ALFOSC_None.dat tns_2025xaz_2025-09-09_NOT_ALFOSC_None.fits Object

Comments

TNS
System

Thu, 09/11/2025 - 15:02

Object coordinates updated

Object coordinates updated according to AT-report 269746 of Group ATLAS
Previous RA, DEC: 03:34:49.955, -09:50:32.98 (53.708145, -9.842494)
Updated RA, DEC: 03:34:49.928, -09:50:33.58 (53.7080346154, -9.84266)