RA/DEC (2000)
17:43:18.615 +70:26:00.45
265.8275625 +70.4334575
Type
SN Ia
Redshift
0.1
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-06-14 00:00:07.776
TNS AT
Y
Public
Y
Discovery Mag
18.95
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, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025nmc - 2025-06-16 22:45:18 Other / Other (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

 ▌LAST_LAST-Cam_Clear
 ▌GOTO-N_GOTO-2_L
 ▌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
21359 2025-06-16 22:45:18 Other / Other 3613 Emmanuel Soubrouillard Emmanuel Soubrouillard, Robin Leadbeater None tns_2025nmc_2025-06-16_22-45-18_Other_Other_None.dat tns_2025nmc_2025-06-16_22-45-18_Other_Other_None.fit Object Spectrum taken by Emmanuel Soubrouillard using an ALPY200 grism slit spectrograph (R~130) and a 0.3m aperture telescope
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- LAST_LAST-Cam 2025-04-28 19:21:09 - 2025-06-21 00:58:50 2460794.30635 - 2460847.54086 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
497133 2025-06-21 00:58:50 2460847.54086 19.25 ABMag Clear- LAST_LAST-Cam 400
497132 2025-04-28 19:21:09 2460794.30635 19.56 ABMag Clear- LAST_LAST-Cam 400 [Last non detection]
L-GOTO GOTO-N_GOTO-2 2025-06-07 23:22:43 - 2025-06-14 00:00:08 2460834.474106 - 2460840.500087 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
494927 2025-06-14 00:00:08 2460840.500087 18.95 0.16 ABMag L-GOTO GOTO-N_GOTO-2 180
494926 2025-06-07 23:22:43 2460834.474106 18.9 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-06-20 14:20:18 - 2025-06-21 11:04:47 2460847.09743 - 2460847.96166 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
497303 2025-06-21 11:04:47 2460847.96166 19.213 0.182 19.37 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
497302 2025-06-20 14:20:18 2460847.09743 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
259600 2025-06-21 17:59:00 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 17:43:18.615 +70:26:00.45 2025-06-21 11:04:47.424 19.213 orange-ATLAS PSN ATLAS25gjz ATLAS N
259516 2025-06-21 03:38:20 LAST_Bot1 E. O. Ofek (WIS),R. Konno (WIS),E. A. Zimmerman (WIS) et al. LAST LAST 17:43:18.535 +70:26:00.74 2025-06-21 00:58:50.304 19.25 Clear- PSN LAST N
258420 2025-06-14 05:08:12 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 17:43:18.619 +70:26:00.02 2025-06-14 00:00:07.776 18.95 L-GOTO Other GOTO25dmm GOTO 2025TNSTR2215....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
21359 2025-06-19 14:53:04 Robin Leadbeater Emmanuel Soubrouillard, Robin Leadbeater None SN Ia 0.1 1 1 Spectrum is that of a type Ia supernova. Classification using SNID gives matches to type Ia supernovae around maximum. The estimated redshift of 0.1 is from SNID. 2025TNSCR2304....1S
Related files
File Comments Last Modified (UT) Modified By
tns_2025nmc_atrep_21359.ps Example SNID match 2025-06-19 14:53:04 Robin Leadbeater
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
21359 2025-06-16 22:45:18 Other / Other 3613 Emmanuel Soubrouillard Emmanuel Soubrouillard, Robin Leadbeater None tns_2025nmc_2025-06-16_22-45-18_Other_Other_None.dat tns_2025nmc_2025-06-16_22-45-18_Other_Other_None.fit Object Spectrum taken by Emmanuel Soubrouillard using an ALPY200 grism slit spectrograph (R~130) and a 0.3m aperture telescope

Comments

TNS
System

Sat, 06/21/2025 - 17:59

Object coordinates updated

Object coordinates updated according to AT-report 259600 of Group ATLAS
Previous RA, DEC: 17:43:18.535, +70:26:00.74 (265.82722709142, +70.433540007765)
Updated RA, DEC: 17:43:18.615, +70:26:00.45 (265.8275625, +70.4334575)

TNS
System

Sat, 06/21/2025 - 03:38

Object coordinates updated

Object coordinates updated according to AT-report 259516 of Group LAST
Previous RA, DEC: 17:43:18.619, +70:26:00.02 (265.827578, +70.433338)
Updated RA, DEC: 17:43:18.535, +70:26:00.74 (265.82722709142, +70.433540007765)