RA/DEC (2000)
20:27:57.651 +12:10:22.06
306.9902127 +12.1727956
Type
SN Ia
Redshift
0.105
Discovery ReportClassification Report
Related AstroNotes: 2026-198
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2026-06-06 15:51:56.448
TNS AT
Y
Public
Y
Discovery Mag
19.85
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_2026owd - 2026-06-10 03:30:00 NOT / ALFOSC (GOTO)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
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
 ▌ATLAS-MLO_ATLAS-01_cyan
   
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
24010 2026-06-10 03:30:00 NOT / ALFOSC J. Mills, D. O'Neill, M. Pursiainen GOTO tns_2026owd_2461201.645833_NOT_ALFOSC_GOTO.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2026-06-09 03:58:14 - 2026-06-09 03:58:14 2461200.66544 - 2461200.66544 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
591252 2026-06-09 03:58:14 2461200.66544 19.7 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
L-GOTO GOTO-S_GOTO-3 2026-06-06 15:51:56 - 2026-06-06 15:51:56 2461198.16107 - 2461198.16107 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
590856 2026-06-06 15:51:56 2461198.16107 19.85 0.2 ABMag L-GOTO GOTO-S_GOTO-3 180
L-GOTO GOTO-N_GOTO-1 2026-06-05 01:15:48 - 2026-06-05 01:15:48 2461196.552643 - 2461196.552643 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
590855 2026-06-05 01:15:48 2461196.552643 19.1 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2026-06-02 08:59:10 - 2026-06-07 09:16:08 2461193.8744213 - 2461198.8862037 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
591059 2026-06-07 09:16:08 2461198.8862037 19.5679 0.139475 ABMag r-ZTF P48_ZTF-Cam
591058 2026-06-02 08:59:10 2461193.8744213 20.0486 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2026-06-11 09:35:16 - 2026-06-11 09:35:16 2461202.8994907 - 2461202.8994907 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
591060 2026-06-11 09:35:16 2461202.8994907 19.2354 0.112317 ABMag g-ZTF P48_ZTF-Cam
cyan-ATLAS ATLAS-MLO_ATLAS-01 2026-06-11 12:17:45 - 2026-06-11 12:17:45 2461203.01233 - 2461203.01233 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
591253 2026-06-11 12:17:45 2461203.01233 19.088 0.141 19.48 ABMag cyan-ATLAS ATLAS-MLO_ATLAS-01 30 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
308202 2026-06-12 09:08:21 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 20:27:57.642 +12:10:22.41 2026-06-11 12:17:45.312 19.088 cyan-ATLAS PSN ATLAS26hdm ATLAS N
308104 2026-06-11 12:03:51 Fritz Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU) et al. ZTF ZTF 20:27:57.651 +12:10:22.06 2026-06-07 09:16:07.999 19.5679 r-ZTF PSN ZTF26abahnhn ZTF N
308001 2026-06-10 16:42:13 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 20:27:57.648 +12:10:22.31 2026-06-06 15:51:56.448 19.85 L-GOTO Other GOTO26fsy GOTO 2026TNSTR2422....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
24004 2026-06-11 09:56:32 Tom Killestein J. Mills, D. O'Neill, M. Pursiainen, T. Killestein, J. Lyman, K. Ackley, M. Dyer, 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, A. Kumar, on behalf of GOTO collaboration GOTO SN Ia 0.105 1 GOTO Redshift estimated from narrow host lines 2026TNSCR2461....1M
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
24010 2026-06-10 03:30:00 NOT / ALFOSC J. Mills, D. O'Neill, M. Pursiainen GOTO tns_2026owd_2461201.645833_NOT_ALFOSC_GOTO.dat Object

Comments

TNS
System

Thu, 06/11/2026 - 12:03

Object coordinates updated

Object coordinates updated according to AT-report 308104 of Group ZTF
Previous RA, DEC: 20:27:57.648, +12:10:22.31 (306.990198, +12.172864)
Updated RA, DEC: 20:27:57.651, +12:10:22.06 (306.9902127, +12.1727956)