RA/DEC (2000)
01:45:17.795 -50:10:46.22
26.324146 -50.179506
Type
SN Ia
Redshift
0.165
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-11-14 11:44:38.112
TNS AT
Y
Public
Y
Discovery Mag
19.96
Filter
L-GOTO
Reporter/s
A. Kumar, 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, B. Godson, T. Killestein, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025adiw - 2025-11-17 03:12:31 SOAR / Goodman (STEP)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-S_GOTO-4_L
 ▌GOTO-S_GOTO-3_L
   
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
22424 2025-11-17 03:12:31 SOAR / Goodman 1800 Andre Santos Charles Kilpatrick STEP tns_2025adiw_2025-11-17_03-12-31_SOAR_Goodman_STEP.flm Object Using SNID (Blondin & Tonry 2007, ApJ, 666, 1024) and SNID-SAGE (Stoppa 2025), we find good matches to SN Ia a few days before maximum light (e.g., SN 2006S at z ~0.165 and -5.5d from maximum).
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-11-14 11:44:38 - 2025-11-14 11:44:38 2460993.989332 - 2460993.989332 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
531007 2025-11-14 11:44:38 2460993.989332 19.96 0.15 ABMag L-GOTO GOTO-S_GOTO-4 360
L-GOTO GOTO-S_GOTO-3 2025-11-12 16:32:18 - 2025-11-12 16:32:18 2460992.189101 - 2460992.189101 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
531006 2025-11-12 16:32:18 2460992.189101 19.3 ABMag L-GOTO GOTO-S_GOTO-3 240 [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
276720 2025-11-14 13:38:09 GOTO_bot A. Kumar, D. O'Neill, K. Ackley et al. GOTO GOTO 01:45:17.795 -50:10:46.22 2025-11-14 11:44:38.112 19.96 L-GOTO Other GOTO25jzc GOTO 2025TNSTR4572....1K N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22423 2025-11-17 16:54:11 Charles Kilpatrick Charles Kilpatrick (Northwestern), Andre Santos (CBPF), Clecio Bom (CBPF), on behalf of STEP STEP SN Ia 0.165 1 STEP 2025TNSCR4628....1K
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
22424 2025-11-17 03:12:31 SOAR / Goodman 1800 Andre Santos Charles Kilpatrick STEP tns_2025adiw_2025-11-17_03-12-31_SOAR_Goodman_STEP.flm Object Using SNID (Blondin & Tonry 2007, ApJ, 666, 1024) and SNID-SAGE (Stoppa 2025), we find good matches to SN Ia a few days before maximum light (e.g., SN 2006S at z ~0.165 and -5.5d from maximum).

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