RA/DEC (2000)
11:10:44.802 -30:20:45.43
167.686674 -30.345952
Type
SN IIn
Redshift
0.03
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2026-05-24 09:13:55.488
TNS AT
Y
Public
Y
Host Name
ESO438-008
Comments
[Object cross-matched with ESO438-008]
Discovery Mag
18.55
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_2026nmv - 2026-06-07 18:46:00 Lesedi / Mookodi (BlackGEM)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
z-step:   v-step: 
   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_orange
 ▌ATLAS-HKO_ATLAS-02_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
24017 2026-06-07 18:46:00 Lesedi / Mookodi 600 N. Erasmus, S. Potter, C. van Gend, H. Worters, P. Rabe (all SAAO) Simon de Wet BlackGEM tns_2026nmv_2026-06-07_18-45-59.720_Lesedi_Mookodi_BlackGEM.csv Object The spectrum was taken with the SAAO's 1-m Lesedi robotic telescope with the Mookodi low-resolution spectrograph and imager as part of the “IO” rapid follow-up program [2]. The spectrum was obtained with the widest (4") slit width, which yields a spectral resolution of R ~ 200 at 6000 Angstrom. [1] https://doi.org/10.1117/1.JATIS.10.2.025005 [2] https://doi.org/10.1117/12.3015250
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2026-05-15 08:48:49 - 2026-05-24 09:13:55 2461175.867234 - 2461184.884674 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
585017 2026-05-24 09:13:55 2461184.884674 18.55 0.07 ABMag L-GOTO GOTO-S_GOTO-4 180
585016 2026-05-15 08:48:49 2461175.867234 20.3 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2026-05-27 01:48:31 - 2026-05-27 01:48:31 2461187.57536 - 2461187.57536 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
587658 2026-05-27 01:48:31 2461187.57536 18.104 0.153 18.76 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-HKO_ATLAS-02 2026-05-26 06:42:14 - 2026-05-26 06:42:14 2461186.77933 - 2461186.77933 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
587657 2026-05-26 06:42:14 2461186.77933 18.2 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 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
306393 2026-05-27 23:04:34 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 11:10:44.802 -30:20:45.43 2026-05-27 01:48:31.104 18.104 orange-ATLAS PSN ATLAS26gkp ATLAS N
305084 2026-05-24 09:49:15 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 11:10:44.782 -30:20:44.89 2026-05-24 09:13:55.488 18.55 L-GOTO Other GOTO26fdk GOTO 2026TNSTR2257....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
24011 2026-06-12 07:44:11 Simon de Wet Simon de Wet BlackGEM SN IIn 0.03 1 BlackGEM The spectrum shows strong H Balmer and weaker He I lines as seen in some SNe IIn. The closest SNID-SAGE (https://arxiv.org/abs/2603.2874) matches are SNe IIn. The redshift is derived from the H Balmer lines. 2026TNSCR2478....1d
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
24017 2026-06-07 18:46:00 Lesedi / Mookodi 600 N. Erasmus, S. Potter, C. van Gend, H. Worters, P. Rabe (all SAAO) Simon de Wet BlackGEM tns_2026nmv_2026-06-07_18-45-59.720_Lesedi_Mookodi_BlackGEM.csv Object The spectrum was taken with the SAAO's 1-m Lesedi robotic telescope with the Mookodi low-resolution spectrograph and imager as part of the “IO” rapid follow-up program [2]. The spectrum was obtained with the widest (4") slit width, which yields a spectral resolution of R ~ 200 at 6000 Angstrom. [1] https://doi.org/10.1117/1.JATIS.10.2.025005 [2] https://doi.org/10.1117/12.3015250

Comments

TNS
System

Wed, 05/27/2026 - 23:04

Object coordinates updated

Object coordinates updated according to AT-report 306393 of Group ATLAS
Previous RA, DEC: 11:10:44.782, -30:20:44.89 (167.68659, -30.345803)
Updated RA, DEC: 11:10:44.802, -30:20:45.43 (167.686674, -30.345952)