RA/DEC (2000)
09:55:09.399 -72:08:43.73
148.789163333 -72.1454816667
Type
SN IIn
Redshift
0.07
Related AstroNotes: 2025-150
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-04-03 09:36:06.912
TNS AT
Y
Public
Y
Discovery Mag
19.06
Filter
L-GOTO
Reporter/s
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, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration

Spectra

 SN_2025gsa - 2025-05-20 03:59:27 ESO-NTT / EFOSC2-NTT (ePESSTO+)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-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
21067 2025-05-20 03:59:27 ESO-NTT / EFOSC2-NTT 300 Stefano Pio Cosentino, Callum Francis Aster Amar Aryan, Ting-Wan Chen, Yu-Hsing Lee, Cheng-Han Lai, Meng-Han Lee, Jie-Lin Yang ePESSTO+ tns_2025gsa_2025-05-20_03-59-27_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025gsa_2025-05-20_03-59-27_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-03-20 10:57:39 - 2025-03-20 10:57:39 2460754.956702 - 2460754.956702 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
480479 2025-03-20 10:57:39 2460754.956702 20 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
L-GOTO GOTO-S_GOTO-3 2025-04-03 09:36:07 - 2025-04-03 09:36:07 2460768.900077 - 2460768.900077 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
480480 2025-04-03 09:36:07 2460768.900077 19.06 0.09 ABMag L-GOTO GOTO-S_GOTO-3 180
orange-ATLAS ATLAS-STH_ATLAS-03 2025-03-31 21:23:24 - 2025-04-04 20:53:05 2460766.39125 - 2460770.3702 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
480819 2025-04-04 20:53:05 2460770.3702 18.628 0.117 19.38 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot
480818 2025-03-31 21:23:24 2460766.39125 19.49 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
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
250950 2025-04-05 00:30:52 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 09:55:09.399 -72:08:43.73 2025-04-04 20:53:05.280 18.628 orange-ATLAS PSN ATLAS25doy ATLAS N
250770 2025-04-03 21:32:32 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 09:55:09.289 -72:08:44.20 2025-04-03 09:36:06.912 19.06 L-GOTO Other GOTO25blw GOTO 2025TNSTR1253....1O N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21067 2025-05-20 18:16:16 ePESSTOplus_Bot1 Stefano Pio Cosentino, Callum Francis Aster, Amar Aryan, Ting-Wan Chen, Yu-Hsing Lee, Cheng-Han Lai, Meng-Han Lee, Jie-Lin Yang, Ofer Yaron on behalf of ePESSTO+ ePESSTO+ SN IIn 0.07 1 ePESSTO+ 2025TNSCR1857....1C
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
21067 2025-05-20 03:59:27 ESO-NTT / EFOSC2-NTT 300 Stefano Pio Cosentino, Callum Francis Aster Amar Aryan, Ting-Wan Chen, Yu-Hsing Lee, Cheng-Han Lai, Meng-Han Lee, Jie-Lin Yang ePESSTO+ tns_2025gsa_2025-05-20_03-59-27_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025gsa_2025-05-20_03-59-27_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 250950 of Group ATLAS
Previous RA, DEC: 09:55:09.289, -72:08:44.20 (148.788704, -72.14561)
Updated RA, DEC: 09:55:09.399, -72:08:43.73 (148.789163333, -72.1454816667)