RA/DEC (2000)
13:37:45.224 -21:25:51.25
204.4384347 -21.4309037
Type
SN IIn
Redshift
0.168
Discovery ReportClassification Report
Related AstroNotes: 2026-79, 2026-88, 2026-92
Reporting Group
MASTER
Discovering Data Source
MASTER
Discovery Date
2026-03-01 07:26:55.104
TNS AT
Y
Public
Y
Discovery Mag
19.3
Filter
Other-
Reporter/s
V.Kuzmina, V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, G.Antipov, A.Sankovich, Yu.Tselik, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A.Sosnovskij (CrAO), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity), D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026etm - 2026-03-23 08:21:00 Magellan-Clay / LDSS-3 (FLEET)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
 ▌ATLAS-CHL_ATLAS-04_cyan
 ▌ATLAS-STH_ATLAS-03_orange
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌Other_Other_Other
   
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
23407 2026-03-23 08:21:00 Magellan-Clay / LDSS-3 Yuri Beletsky Harsh Kumar FLEET tns_2026etm_2026-03-23_08-21-00_Magellan-Clay_LDSS-3_FLEET.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2026-02-11 17:29:57 - 2026-02-17 15:43:00 2461083.229131 - 2461089.154863 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
564634 2026-02-17 15:43:00 2461089.154863 20.39 0.21 ABMag L-GOTO GOTO-S_GOTO-4 180
564633 2026-02-11 17:29:57 2461083.229131 20.3 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
cyan-ATLAS ATLAS-CHL_ATLAS-04 2026-03-23 05:53:01 - 2026-03-23 05:53:01 2461122.74515 - 2461122.74515 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
569441 2026-03-23 05:53:01 2461122.74515 19.036 0.122 19.64 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2026-03-19 02:19:58 - 2026-03-19 02:19:58 2461118.5972 - 2461118.5972 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
569440 2026-03-19 02:19:58 2461118.5972 17.31 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
r-ZTF P48_ZTF-Cam 2026-02-26 10:29:58 - 2026-02-26 10:29:58 2461097.9374769 - 2461097.9374769 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
564226 2026-02-26 10:29:58 2461097.9374769 19.7791 0.216494 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2026-02-14 12:32:49 - 2026-03-12 10:03:07 2461086.0227894 - 2461111.918831 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
564227 2026-03-12 10:03:07 2461111.918831 19.5112 0.166099 ABMag g-ZTF P48_ZTF-Cam
564225 2026-02-14 12:32:49 2461086.0227894 20.1791 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
Other- Other_Other 2025-04-05 04:38:57 - 2026-05-22 04:15:20 2460770.69371 - 2461182.67731 15
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
584798 2026-05-22 04:15:20 2461182.67731 19.7 20.1 VegaMag Other- Other_Other 90 Robot MASTER-OAFA
584797 2026-05-22 04:02:50 2461182.66863 19.7 20.2 VegaMag Other- Other_Other 90 Robot MASTER-OAFA
584795 2026-04-26 03:16:52 2461156.63671 19.1 20.1 VegaMag Other- Other_Other 180 Robot MASTER-OAFA
584794 2026-04-26 03:12:56 2461156.63398 19.5 20.1 VegaMag Other- Other_Other 180 Robot MASTER-OAFA
584780 2026-04-24 03:23:04 2461154.64102 19.4 20 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
584779 2026-04-24 03:13:04 2461154.63407 19.4 20 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
577144 2026-04-23 06:10:00 2461153.75695 19.2 20 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
577143 2026-04-23 05:30:45 2461153.72969 19.2 20.1 VegaMag Other- Other_Other 60 Robot MASTER-OAFA
562498 2026-03-01 08:52:45 2461100.86996 19.3 20.2 VegaMag Other- Other_Other 180 Robot MASTER-OAFA
562497 2026-03-01 07:26:55 2461100.81036 19.3 20 VegaMag Other- Other_Other 180 Robot MASTER-OAFA
584778 2025-04-05 05:09:56 2460770.71523 21 VegaMag Other- Other_Other 180 Robot [Last non detection] MASTER-OAFA
584793 2025-04-05 05:09:56 2460770.71523 21 VegaMag Other- Other_Other 180 Robot [Last non detection] MASTER-OAFA
562496 2025-04-05 05:09:56 2460770.71523 21 VegaMag Other- Other_Other 180 Robot [Last non detection] MASTER-OAFA
577142 2025-04-05 04:38:57 2460770.69371 21 VegaMag Other- Other_Other 180 Robot [Last non detection] MASTER-OAFA
584796 2025-04-05 04:38:57 2460770.69371 21 VegaMag Other- Other_Other 180 Robot [Last non detection] MASTER-OAFA
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
304975 2026-05-23 10:26:58 MASTER F.Podesta, V.Lipunov, E.Gorbovskoy et al. MASTER MASTER 13:37:45.190 -21:25:50.70 2026-05-22 04:02:49.632 19.7 Other- PSN MASTER OT J133745.19-212550.7 MASTER N
304974 2026-05-23 10:26:56 MASTER N.Ansimova, V.Lipunov, E.Gorbovskoy et al. MASTER MASTER 13:37:45.240 -21:25:51.10 2026-04-26 03:12:55.872 19.5 Other- PSN MASTER OT J133745.24-212551.1 MASTER N
304969 2026-05-23 08:53:18 MASTER V.Kapkova, V.Lipunov, E.Gorbovskoy et al. MASTER MASTER 13:37:45.170 -21:25:50.90 2026-04-24 03:13:03.648 19.4 Other- PSN MASTER OT J133745.17-212550.9 MASTER unfiltered N
301073 2026-04-23 11:06:44 MASTER K.Vetrov, V.Lipunov, E.Gorbovskoy et al. MASTER MASTER 13:37:45.210 -21:25:50.80 2026-04-23 05:30:45.216 19.2 Other- PSN MASTER OT J133745.21-212550.8 MASTER N
297062 2026-03-23 11:07:27 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 13:37:45.223 -21:25:51.09 2026-03-23 05:53:00.960 19.036 cyan-ATLAS PSN ATLAS26dfb ATLAS N
294451 2026-03-14 09:26:38 GOTO_bot D. O'Neill, M. Pursiainen, K. Ackley et al. GOTO GOTO 13:37:45.215 -21:25:51.38 2026-02-17 15:42:59.904 20.39 L-GOTO PSN GOTO26bul GOTO N
294276 2026-03-12 10:14:16 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 13:37:45.224 -21:25:51.25 2026-02-26 10:29:58.004 19.7791 r-ZTF PSN ZTF26aakroun ZTF N
293455 2026-03-01 22:30:57 MASTER V.Kuzmina, V.Lipunov, E.Gorbovskoy et al. MASTER MASTER 13:37:45.230 -21:25:51.20 2026-03-01 07:26:55.104 19.3 Other- PSN MASTER OT J133745.23-212551.2 MASTER new OT, PanSTARR 24mag in history limit means >~4.7m current outburst ampl, also presents at MASTER images at 19feb with m~20.2 2026TNSTR.878....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
23405 2026-03-31 20:35:37 Peter Blanchard Peter Blanchard (Harvard/CfA), Harsh Kumar (Harvard/CfA), Edo Berger (Harvard/CfA), Sebastian Gomez (UT Austin), Daichi Hiramatsu (Univ. of Florida) FLEET SN IIn 0.168 1 FLEET 2026TNSCR1380....1B
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
23407 2026-03-23 08:21:00 Magellan-Clay / LDSS-3 Yuri Beletsky Harsh Kumar FLEET tns_2026etm_2026-03-23_08-21-00_Magellan-Clay_LDSS-3_FLEET.ascii Object

Comments

TNS
System

Thu, 03/12/2026 - 10:14

Object coordinates updated

Object coordinates updated according to AT-report 294276 of Group ZTF
Previous RA, DEC: 13:37:45.230, -21:25:51.20 (204.438458, -21.430889)
Updated RA, DEC: 13:37:45.224, -21:25:51.25 (204.4384347, -21.4309037)