RA/DEC (2000)
11:30:53.178 -04:21:09.37
172.721574641 -4.35260307837
Type
SN IIb
Redshift
0.0369
Discovery ReportClassification Report
Related AstroNotes: 2026-129
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2026-04-12 23:31:21.504
TNS AT
Y
Public
Y
Discovery Mag
19.4
Filter
L-GOTO
Reporter/s
M. Pursiainen, 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, R. Starling, B. Gompertz, B. Godson, T. Killestein, A. Kumar, D. O'Neill, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026jms - 2026-05-07 22:38:30 NOT / ALFOSC (ZTF)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-3_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_i
 ▌P48_ZTF-Cam_r
 ▌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
23673 2026-05-07 22:38:30 NOT / ALFOSC 1800 Astrid Lind Bouquin Anjasha Gangopadhyay ZTF tns_2026jms_2461168.4434_NOT_ALFOSC_ZTF.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-3 2026-04-09 11:20:41 - 2026-04-09 11:20:41 2461139.972702 - 2461139.972702 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
575094 2026-04-09 11:20:41 2461139.972702 19.9 ABMag L-GOTO GOTO-S_GOTO-3 90 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2026-04-26 03:25:36 - 2026-05-02 03:02:39 2461156.64278 - 2461162.62684 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
579406 2026-05-02 03:02:39 2461162.62684 18.625 0.2 18.63 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
579405 2026-04-26 03:25:36 2461156.64278 18.93 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-1 2026-04-12 23:31:22 - 2026-04-12 23:31:22 2461143.48011 - 2461143.48011 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
575095 2026-04-12 23:31:22 2461143.48011 19.4 0.14 ABMag L-GOTO GOTO-N_GOTO-1 180
i-ZTF P48_ZTF-Cam 2026-04-17 06:20:34 - 2026-04-17 06:20:34 2461147.7642824 - 2461147.7642824 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
575902 2026-04-17 06:20:34 2461147.7642824 19.8902 ABMag i-ZTF P48_ZTF-Cam [Last non detection]
r-ZTF P48_ZTF-Cam 2026-04-09 04:58:45 - 2026-04-17 06:35:42 2461139.7074653 - 2461147.7747917 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
575903 2026-04-17 06:35:42 2461147.7747917 19.9735 0.19906 ABMag r-ZTF P48_ZTF-Cam
579279 2026-04-17 06:35:42 2461147.7747917 19.9735 0.19906 20.2252 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF, classified by Fink
579278 2026-04-09 04:58:45 2461139.7074653 20.1998 ABMag r-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF, classified by Fink
w-P1 PS1_GPC1 2026-05-09 06:44:43 - 2026-05-09 06:44:43 2461169.78105 - 2461169.78105 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
581518 2026-05-09 06:44:43 2461169.78105 18.91 0.03 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
303247 2026-05-11 14:01:32 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 11:30:53.178 -04:21:09.37 2026-05-09 06:44:42.720 18.91 w-P1 PSN PS26bgf Pan-STARRS N
302229 2026-05-03 16:17:42 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 11:30:53.187 -04:21:09.33 2026-05-02 03:02:38.976 18.625 orange-ATLAS PSN ATLAS26fcd ATLAS N
302159 2026-05-02 18:44:47 Fink Julien Peloton, Anais Moller, Emille E. O. Ishida on behalf of the Fink broker Fink ZTF 11:30:53.180 -04:21:09.35 2026-04-17 06:35:42.003 19.9735 r-ZTF PSN ZTF26aasygmo ZTF Early SN Ia candidate classified by Fink using the public ZTF stream. Object data at https://fink-portal.org/ZTF26aasygmo N
300444 2026-04-17 07:07:04 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 11:30:53.179 -04:21:09.60 2026-04-17 06:35:42.002 19.9735 r-ZTF PSN ZTF26aasygmo ZTF N
300050 2026-04-13 15:03:40 GOTO_bot M. Pursiainen, K. Ackley, M. Dyer et al. GOTO GOTO 11:30:53.199 -04:21:09.86 2026-04-12 23:31:21.504 19.4 L-GOTO PSN GOTO26dhc GOTO 2026TNSTR1568....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
23670 2026-05-08 13:50:22 Ragnhild Lunnan Ragnhild Lunnan, Anjasha Gangopadhyay, Avinash Singh, Yang Hu ZTF SN IIb 0.0369 1 ZTF Matches with Type IIb 2011dh at around maximum. 2026TNSCR2002....1L
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
23673 2026-05-07 22:38:30 NOT / ALFOSC 1800 Astrid Lind Bouquin Anjasha Gangopadhyay ZTF tns_2026jms_2461168.4434_NOT_ALFOSC_ZTF.ascii Object

Comments

TNS
System

Mon, 05/11/2026 - 14:01

Object coordinates updated

Object coordinates updated according to AT-report 303247 of Group Pan-STARRS
Previous RA, DEC: 11:30:53.180, -04:21:09.35 (172.721583, -4.3525971545455)
Updated RA, DEC: 11:30:53.178, -04:21:09.37 (172.721574641, -4.35260307837)

TNS
System

Sat, 05/02/2026 - 18:44

Object coordinates updated

Object coordinates updated according to AT-report 302159 of Group ZTF
Previous RA, DEC: 11:30:53.179, -04:21:09.60 (172.7215772, -4.3526653)
Updated RA, DEC: 11:30:53.180, -04:21:09.35 (172.721583, -4.3525971545455)

TNS
System

Fri, 04/17/2026 - 07:07

Object coordinates updated

Object coordinates updated according to AT-report 300444 of Group ZTF
Previous RA, DEC: 11:30:53.199, -04:21:09.86 (172.721664, -4.352739)
Updated RA, DEC: 11:30:53.179, -04:21:09.60 (172.7215772, -4.3526653)