RA/DEC (2000)
02:57:48.538 -36:42:45.80
44.452242453431 -36.712722995251
Type
SN II
Redshift
0.02109
Related AstroNotes: 2026-278
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2026-09-17 12:44:22.848
TNS AT
Y
Public
Y
Host Name
ESO356-022
Comments
[Object cross-matched with ESO356-022]
Discovery Mag
18.553
Filter
orange-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), M. R. Alarcón, J. Licandro, P. Nichita (IAC), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, J. Weston, X. Sheng, C. R. Angus, D. Magill, A. J. Smith, L. Shingles (QUB), A. Aamer (Arizona), P. Ramsden (Birmingham/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle, L. Eastman (Oxford), L. Rhodes (TSI/McGill), T. Moore, A. Rest (STScI), T.-W. Chen (NCU), C. Deasy-Millar (TCD), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)

Spectra

 ▌SN_2026abyp - 2026-09-20 00:00:00 ANU-2.3m / WiFeS (Supernova Alliance)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-MLO_ATLAS-01_orange
 ▌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
24731 2026-09-20 00:00:00 ANU-2.3m / WiFeS B. P. Schmidt (ANU) L. Rauf (ANU) Supernova Alliance tns_2026abyp_2026-09-20_ANU-2.3m_WiFeS_Supernova_Alliance.dat tns_2026abyp_2026-09-20_ANU-2.3m_WiFeS_Supernova_Alliance.fits Object Fit with superfit.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2026-09-14 15:01:50 - 2026-09-17 17:04:54 2461298.126268 - 2461301.211742 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
620531 2026-09-17 17:04:54 2461301.211742 18.44 0.04 ABMag L-GOTO GOTO-S_GOTO-4 180
620530 2026-09-14 15:01:50 2461298.126268 20.5 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2026-09-14 13:20:20 - 2026-09-17 12:44:23 2461298.05579 - 2461301.03082 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
619751 2026-09-17 12:44:23 2461301.03082 18.553 0.126 19.28 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot
619750 2026-09-14 13:20:20 2461298.05579 19.3 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
w-P1 PS1_GPC1 2026-09-16 13:05:40 - 2026-09-16 13:05:40 2461300.0456 - 2461300.0456 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
620330 2026-09-16 13:05:40 2461300.0456 19.05 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
324323 2026-09-19 22:39:33 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 02:57:48.528 -36:42:45.82 2026-09-17 17:04:54.336 18.44 L-GOTO Other GOTO26jxb GOTO This transient was discovered with the assistance of the GOTO Kilonova Seekers Citizen Scientists on Zooniverse. This candidate was flagged by volunteers: Ciro Sirio Perrella, Niladri S Kar, M.T. Mazzucato, Jose Alberto da Silva Campos, Andrey CRB Gorokhov. The most likely subtype for this transient is supernova (88.9% consensus). N
324213 2026-09-18 19:26:41 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 02:57:48.538 -36:42:45.80 2026-09-16 13:05:39.840 19.05 w-P1 PSN PS26hqf Pan-STARRS N
323925 2026-09-17 19:23:01 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 02:57:48.507 -36:42:46.20 2026-09-17 12:44:22.848 18.553 orange-ATLAS PSN ATLAS26lpu ATLAS 2026TNSTR3758....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
24723 2026-09-21 10:34:53 Liana Rauf L. Rauf (ANU), B. P. Schmidt (ANU), K. Auchettl (University of Melbourne/UCSC), P. Armstrong (ANU), D. Cao (ANU), C. Lidman (ANU), B. Martin (ANU), A. Protheroe (ANU), J. Shi (University of Melbourne), and B. E. Tucker (ANU) Supernova Alliance SN II 0.02109 1 Supernova Alliance Has a hot blue continuum with a hint of Halpha emission. 2026TNSCR3824....1R
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
24731 2026-09-20 00:00:00 ANU-2.3m / WiFeS B. P. Schmidt (ANU) L. Rauf (ANU) Supernova Alliance tns_2026abyp_2026-09-20_ANU-2.3m_WiFeS_Supernova_Alliance.dat tns_2026abyp_2026-09-20_ANU-2.3m_WiFeS_Supernova_Alliance.fits Object Fit with superfit.

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 324213 of Group Pan-STARRS
Previous RA, DEC: 02:57:48.538, -36:42:45.80 (44.452242453431, -36.712722995251)
Updated RA, DEC: 02:57:48.538, -36:42:45.80 (44.452242453431, -36.712722995251)

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 324213 of Group Pan-STARRS
Previous RA, DEC: 02:57:48.507, -36:42:46.20 (44.4521111111, -36.7128322222)
Updated RA, DEC: 02:57:48.538, -36:42:45.80 (44.452242453431, -36.712722995251)