RA/DEC (2000)
11:41:58.173 +11:53:13.31
175.492389109 +11.8870311889
Type
SN IIn
Redshift
0.129
Discovery ReportClassification Report
Related AstroNotes: 2026-92
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2026-01-15 02:36:55.872
TNS AT
Y
Public
Y
Discovery Mag
20.02
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, R. Starling, B. Gompertz, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026aex - 2026-03-25 08:10:07 MMT / BINOSPEC (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

 ▌ATLAS-TDO_ATLAS-05_wide
 ▌GOTO-S_GOTO-3_L
 ▌PS2_GPC2_w
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-MLO_ATLAS-01_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
23413 2026-03-25 08:10:07 MMT / BINOSPEC Salmas Peter Blanchard FLEET tns_2026aex_2026-03-25_08-10-07_MMT_BINOSPEC_FLEET.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2026-01-21 04:00:29 - 2026-01-21 04:00:29 2461061.667 - 2461061.667 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
552957 2026-01-21 04:00:29 2461061.667 19.941 0.16 20.22 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot
L-GOTO GOTO-S_GOTO-3 2026-01-10 17:26:53 - 2026-01-10 17:26:53 2461051.227003 - 2461051.227003 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
550116 2026-01-10 17:26:53 2461051.227003 19.7 ABMag L-GOTO GOTO-S_GOTO-3 135 [Last non detection]
w-P1 PS2_GPC2 2026-01-16 12:22:44 - 2026-01-16 12:22:44 2461057.01579 - 2461057.01579 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
551052 2026-01-16 12:22:44 2461057.01579 19.86 0.08 22 ABMag w-P1 PS2_GPC2 45 Robot
L-GOTO GOTO-N_GOTO-1 2026-01-15 02:36:56 - 2026-01-15 02:36:56 2461055.608977 - 2461055.608977 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
550117 2026-01-15 02:36:56 2461055.608977 20.02 0.14 ABMag L-GOTO GOTO-N_GOTO-1 180
r-ZTF P48_ZTF-Cam 2026-01-10 12:49:27 - 2026-01-10 12:49:27 2461051.0343403 - 2461051.0343403 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
551551 2026-01-10 12:49:27 2461051.0343403 19.3605 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2026-01-12 09:35:02 - 2026-01-19 09:17:20 2461052.8993287 - 2461059.887037 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
551553 2026-01-19 09:17:20 2461059.887037 19.7584 0.149351 ABMag g-ZTF P48_ZTF-Cam
551552 2026-01-12 09:35:02 2461052.8993287 19.9894 0.155939 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-MLO_ATLAS-01 2026-01-20 14:42:33 - 2026-01-20 14:42:33 2461061.11288 - 2461061.11288 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
552956 2026-01-20 14:42:33 2461061.11288 19.55 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 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
288474 2026-01-23 01:30:03 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 11:41:58.196 +11:53:13.03 2026-01-21 04:00:28.800 19.941 wide-ATLAS PSN ATLAS26aze ATLAS N
287879 2026-01-19 12:48:01 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 11:41:58.178 +11:53:13.37 2026-01-12 09:35:01.999 19.9894 g-ZTF PSN ZTF26aabkeee ZTF N
287666 2026-01-17 21:23:53 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 11:41:58.173 +11:53:13.31 2026-01-16 12:22:44.256 19.86 w-P1 PSN PS26hr Pan-STARRS N
287228 2026-01-15 10:02:31 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 11:41:58.206 +11:53:13.37 2026-01-15 02:36:55.872 20.02 L-GOTO Other GOTO26ln GOTO 2026TNSTR.167....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
23411 2026-03-31 21:00:23 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 0.129 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
23413 2026-03-25 08:10:07 MMT / BINOSPEC Salmas Peter Blanchard FLEET tns_2026aex_2026-03-25_08-10-07_MMT_BINOSPEC_FLEET.txt Object

Comments

TNS
System

Sat, 01/17/2026 - 21:23

Object coordinates updated

Object coordinates updated according to AT-report 287666 of Group Pan-STARRS
Previous RA, DEC: 11:41:58.206, +11:53:13.37 (175.492527, +11.887048)
Updated RA, DEC: 11:41:58.173, +11:53:13.31 (175.492389109, +11.8870311889)