RA/DEC (2000)
15:13:10.732 +40:31:49.76
228.2947165 +40.5304896
Type
SN Ia
Redshift
0.031239
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2026-05-05 23:31:01.632
TNS AT
Y
Public
Y
Discovery Mag
18.62
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_2026llu - 2026-05-16 21:16:00 BL41 / FOSC-E5535 (None)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-N_GOTO-2_L
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌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
23735 2026-05-16 21:16:00 BL41 / FOSC-E5535 7200 Claudio Balcon Claudio Balcon None tns_2026llu_2026-05-16_21-16-00_BL41_FOSC-E5535_None.dat tns_2026llu_2026-05-16_21-16-00_BL41_FOSC-E5535_None.fit Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2026-05-01 23:31:14 - 2026-05-05 23:31:02 2461162.480025 - 2461166.479876 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
579809 2026-05-05 23:31:02 2461166.479876 18.62 0.06 ABMag L-GOTO GOTO-N_GOTO-2 180
579808 2026-05-01 23:31:14 2461162.480025 19.2 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2026-05-07 09:52:02 - 2026-05-07 09:52:02 2461167.9111343 - 2461167.9111343 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
588059 2026-05-07 09:52:02 2461167.9111343 18.0648 0.0296866 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2026-05-31 08:24:35 - 2026-05-31 08:24:35 2461191.8504051 - 2461191.8504051 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
588060 2026-05-31 08:24:35 2461191.8504051 17.6945 0.0589846 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-HKO_ATLAS-02 2026-05-05 12:27:16 - 2026-05-06 09:50:33 2461166.01894 - 2461166.9101 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
579889 2026-05-06 09:50:33 2461166.9101 18.93 0.304 19.31 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
579888 2026-05-05 12:27:16 2461166.01894 19.16 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
306640 2026-05-31 08:45:35 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 15:13:10.732 +40:31:49.76 2026-05-07 09:52:02.003 18.0648 r-ZTF PSN ZTF26aauyapp ZTF N
302493 2026-05-06 21:54:49 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 15:13:10.744 +40:31:49.44 2026-05-06 09:50:32.640 18.93 orange-ATLAS PSN ATLAS26fey ATLAS N
302449 2026-05-06 07:44:45 GOTO_bot M. Pursiainen, K. Ackley, M. Dyer et al. GOTO GOTO 15:13:10.745 +40:31:49.83 2026-05-05 23:31:01.632 18.62 L-GOTO PSN GOTO26ehk GOTO 2026TNSTR1957....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
23732 2026-05-16 22:43:24 Claudio Balcon Claudio Balcon (Belluno A.O. ISSP) None SN Ia 0.031239 1 GELATO Harutyunyan et al., 2008, A&A, 488, 383 (gelato@tng.iac.es) suggests that this spectrum resembles that of a Type Ia supernova at the host galaxy's redshift, the value from NED. While the exact sub-type remains unclear from the similarity distribution, some spectral similarities are also found with sub-luminous/transitional events such as SN 1986G. 2026TNSCR2135....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
23735 2026-05-16 21:16:00 BL41 / FOSC-E5535 7200 Claudio Balcon Claudio Balcon None tns_2026llu_2026-05-16_21-16-00_BL41_FOSC-E5535_None.dat tns_2026llu_2026-05-16_21-16-00_BL41_FOSC-E5535_None.fit Object

Comments

TNS
System

Sun, 05/31/2026 - 08:45

Object coordinates updated

Object coordinates updated according to AT-report 306640 of Group ZTF
Previous RA, DEC: 15:13:10.744, +40:31:49.44 (228.294765455, +40.5304)
Updated RA, DEC: 15:13:10.732, +40:31:49.76 (228.2947165, +40.5304896)

TNS
System

Wed, 05/06/2026 - 21:54

Object coordinates updated

Object coordinates updated according to AT-report 302493 of Group ATLAS
Previous RA, DEC: 15:13:10.745, +40:31:49.83 (228.294772, +40.530509)
Updated RA, DEC: 15:13:10.744, +40:31:49.44 (228.294765455, +40.5304)