RA/DEC (2000)
16:25:24.908 +38:48:20.65
246.353783191 +38.8057360227
Type
SN II
Redshift
0.03
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2026-07-10 21:52:50.016
TNS AT
Y
Public
Y
Discovery Mag
18.51
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_2026tnd - 2026-07-24 00:00:00 Lick-3m / KAST (UCSC)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-N_GOTO-2_L
 ▌PS2_GPC2_r
 ▌ATLAS-MLO_ATLAS-01_orange
 ▌ATLAS-HKO_ATLAS-02_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
24383 2026-07-24 00:00:00 Lick-3m / KAST Kishore C. Patra Kishore C. Patra UCSC tns_2026tnd_2026-07-24_Lick-3m_KAST_UCSC.flm Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2026-07-04 21:59:35 - 2026-07-10 21:52:50 2461226.416378 - 2461232.41169 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
602036 2026-07-10 21:52:50 2461232.41169 18.51 0.06 ABMag L-GOTO GOTO-N_GOTO-2 180
602035 2026-07-04 21:59:35 2461226.416378 19.9 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
r-P1 PS2_GPC2 2026-07-18 06:45:39 - 2026-07-18 06:45:39 2461239.7817 - 2461239.7817 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
605546 2026-07-18 06:45:39 2461239.7817 18.29 0.04 20.6 ABMag r-P1 PS2_GPC2 27 Robot
orange-ATLAS ATLAS-MLO_ATLAS-01 2026-07-15 10:33:12 - 2026-07-15 10:33:12 2461236.93972 - 2461236.93972 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
605216 2026-07-15 10:33:12 2461236.93972 19.27 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
cyan-ATLAS ATLAS-HKO_ATLAS-02 2026-07-16 08:53:21 - 2026-07-16 08:53:21 2461237.87038 - 2461237.87038 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
605217 2026-07-16 08:53:21 2461237.87038 18.109 0.072 18.95 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 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
315989 2026-07-20 19:11:03 YSE_Bot1 D. O. Jones (UC Santa Cruz), K. D. French (Carnegie, Illinois), A. Agnello et al. YSE Pan-STARRS 16:25:24.908 +38:48:20.65 2026-07-18 06:45:38.880 18.29 r-P1 PSN PS26fcl Pan-STARRS N
315835 2026-07-19 14:43:32 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 16:25:24.917 +38:48:20.60 2026-07-16 08:53:20.832 18.109 cyan-ATLAS PSN ATLAS26itc ATLAS N
314141 2026-07-10 22:30:56 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 16:25:24.934 +38:48:20.71 2026-07-10 21:52:50.016 18.51 L-GOTO Other GOTO26grc GOTO 2026TNSTR2864....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
24376 2026-07-25 04:49:58 Kishore C. Patra Kishore C. Patra, Ryan J. Foley (UCSC) UCSC SN II 0.03 1 UCSC We report the classification of this object with spectroscopic observations with the Kast spectrograph on the Shane telescope. Observations were made on 2026 July 24 UT. Classifications were performed with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024). Notes: When the redshift is given to 2 decimal places, it is derived from the SN spectrum. Otherwise, the redshift is determined from the host galaxy. 2026TNSCR3054....1P
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
24383 2026-07-24 00:00:00 Lick-3m / KAST Kishore C. Patra Kishore C. Patra UCSC tns_2026tnd_2026-07-24_Lick-3m_KAST_UCSC.flm Object

Comments

TNS
System

Mon, 07/20/2026 - 19:11

Object coordinates updated

Object coordinates updated according to AT-report 315989 of Group Pan-STARRS
Previous RA, DEC: 16:25:24.917, +38:48:20.60 (246.35382, +38.8057225)
Updated RA, DEC: 16:25:24.908, +38:48:20.65 (246.353783191, +38.8057360227)

TNS
System

Sun, 07/19/2026 - 14:43

Object coordinates updated

Object coordinates updated according to AT-report 315835 of Group ATLAS
Previous RA, DEC: 16:25:24.934, +38:48:20.71 (246.35389, +38.805754)
Updated RA, DEC: 16:25:24.917, +38:48:20.60 (246.35382, +38.8057225)