RA/DEC (2000)
00:17:25.338 +06:21:55.96
4.355575 +6.365544
Type
SN Ia
Redshift
0.1
Discovery ReportClassification Report
Related AstroNotes: 2025-246
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-07-20 04:13:09.984
TNS AT
Y
Public
Y
Discovery Mag
18.88
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_2025rom - 2025-07-31 01:22:03 NOT / ALFOSC (BlackGEM)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-3_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌GOTO-N_GOTO-1_L
 ▌BG4_BlackGEM-Cam4_BG-q
 ▌BG2_BlackGEM-Cam2_BG-q
 ▌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
21716 2025-07-31 01:22:03 NOT / ALFOSC 1400 Marco Antonio Gomez Muñoz Gerard Garcia Moreno BlackGEM tns_2025rom_2025-07-31_01-22-03_NOT_ALFOSC_BlackGEM.txt Object Reduced using pypeit
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-3 2025-07-13 17:02:32 - 2025-07-13 17:02:32 2460870.210092 - 2460870.210092 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
503650 2025-07-13 17:02:32 2460870.210092 19.1 ABMag L-GOTO GOTO-S_GOTO-3 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-07-19 07:47:29 - 2025-07-19 07:47:29 2460875.82464 - 2460875.82464 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
503784 2025-07-19 07:47:29 2460875.82464 18.97 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-07-20 04:13:10 - 2025-07-20 04:13:10 2460876.675812 - 2460876.675812 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
503651 2025-07-20 04:13:10 2460876.675812 18.88 0.11 ABMag L-GOTO GOTO-N_GOTO-1 180
BG-q-BlackGem BG4_BlackGEM-Cam4 2024-11-26 00:39:54 - 2024-11-26 00:39:54 2460640.5277083 - 2460640.5277083 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
504231 2024-11-26 00:39:54 2460640.5277083 21.11 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic [Last non detection]
BG-q-BlackGem BG2_BlackGEM-Cam2 2025-07-22 05:41:34 - 2025-07-22 05:41:34 2460878.7371991 - 2460878.7371991 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
504232 2025-07-22 05:41:34 2460878.7371991 18.93 0.06 20.83 ABMag BG-q-BlackGem BG2_BlackGEM-Cam2 60 robotic
r-ZTF P48_ZTF-Cam 2025-07-22 09:39:39 - 2025-07-22 09:39:39 2460878.9025347 - 2460878.9025347 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
504728 2025-07-22 09:39:39 2460878.9025347 20.5227 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-07-23 07:52:03 - 2025-07-24 08:51:32 2460879.8278125 - 2460880.8691204 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
504730 2025-07-24 08:51:32 2460880.8691204 18.8416 0.102831 ABMag g-ZTF P48_ZTF-Cam
504729 2025-07-23 07:52:03 2460879.8278125 18.8001 0.1206 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-07-20 12:07:26 - 2025-07-20 12:07:26 2460877.00516 - 2460877.00516 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
503785 2025-07-20 12:07:26 2460877.00516 19.194 0.18 19.4 ABMag orange-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
263637 2025-07-25 04:56:11 Fritz Daniel Perley (LJMU),Christoffer Fremling (Caltech),Theophile du Laz (Caltech) on behalf of ZTF et al. ZTF ZTF 00:17:25.335 +06:21:55.93 2025-07-23 07:52:02.999 18.8001 g-ZTF PSN ZTF25abdfbrc ZTF N
263396 2025-07-22 12:36:02 BlackGEM_Bot1 J. A. Paice,H. Tranin,F. Stoppa et al. BlackGEM BlackGEM 00:17:25.338 +06:21:55.96 2025-07-22 05:41:34.000 18.93 BG-q-BlackGem PSN BGEM J001725.33+062155.9 BlackGEM N
263138 2025-07-21 00:07:42 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 00:17:25.337 +06:21:56.36 2025-07-20 12:07:25.824 19.194 orange-ATLAS PSN ATLAS25hyv ATLAS N
263075 2025-07-20 10:32:28 GOTO_bot A. Kumar,D. O'Neill,K. Ackley et al. GOTO GOTO 00:17:25.355 +06:21:56.00 2025-07-20 04:13:09.984 18.88 L-GOTO Other GOTO25fdg GOTO 2025TNSTR2783....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
21716 2025-08-08 06:52:57 Hugo Tranin Hugo Tranin BlackGEM SN Ia 0.1 1 1 BlackGEM, CET-3PO Classified with SNID SAGE as SN Ia-norm, with medium confidence. RLAP=14.3 Redshift: 0.098 ± 0.0001 Age: 5 ± 3 days 2025TNSCR3115....1T
Related files
File Comments Last Modified (UT) Modified By
tns_2025rom_atrep_21716_BlackGEM.JPG 2025-08-08 06:52:57 Hugo Tranin
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
21716 2025-07-31 01:22:03 NOT / ALFOSC 1400 Marco Antonio Gomez Muñoz Gerard Garcia Moreno BlackGEM tns_2025rom_2025-07-31_01-22-03_NOT_ALFOSC_BlackGEM.txt Object Reduced using pypeit

Comments

TNS
System

Tue, 07/22/2025 - 12:36

Object coordinates updated

Object coordinates updated according to AT-report 263396 of Group BlackGEM
Previous RA, DEC: 00:17:25.337, +06:21:56.36 (4.35557, +6.36565666667)
Updated RA, DEC: 00:17:25.338, +06:21:55.96 (4.355575, +6.365544)

TNS
System

Mon, 07/21/2025 - 00:07

Object coordinates updated

Object coordinates updated according to AT-report 263138 of Group ATLAS
Previous RA, DEC: 00:17:25.355, +06:21:56.00 (4.355645, +6.365555)
Updated RA, DEC: 00:17:25.337, +06:21:56.36 (4.35557, +6.36565666667)