RA/DEC (2000)
14:47:01.556 +13:40:10.38
221.756481772 +13.6695506607
Type
SN Ia-91bg-like
Redshift
0.030389
Discovery ReportClassification Report
Reporting Group
BlackGEM
Discovering Data Source
BlackGEM
Discovery Date
2025-06-24 00:54:07.000
TNS AT
Y
Public
Y
Discovery Mag
18.87
Filter
BG-q-BlackGem
Reporter/s
G. Ramsay, H. Tranin, F. Stoppa, D. Pieterse, S. Faris, P. Groot, P. Vreeswijk, N. Blagorodnova, J. van Roestel, H. Wichern, S. Scaringi
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025otl - 2025-06-28 00:00:00 UH88 / SNIFS (SCAT)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-N_GOTO-1_L
 ▌BG4_BlackGEM-Cam4_BG-q
 ▌BG3_BlackGEM-Cam3_BG-q
 ▌ATLAS-MLO_ATLAS-01_cyan
 ▌ATLAS-HKO_ATLAS-02_orange
 ▌PS1_GPC1_w
   
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
21420 2025-06-28 00:00:00 UH88 / SNIFS 1800 Hoogendam Hoogendam SCAT tns_2025otl_2025-06-28_UH88_SNIFS_SCAT.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-1 2025-06-21 21:38:58 - 2025-06-22 21:39:41 2460848.402063 - 2460849.402561 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
498624 2025-06-22 21:39:41 2460849.402561 19.42 0.17 ABMag L-GOTO GOTO-N_GOTO-1 180
498623 2025-06-21 21:38:58 2460848.402063 19.7 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
BG-q-BlackGem BG4_BlackGEM-Cam4 2025-06-10 01:14:10 - 2025-06-10 01:14:10 2460836.5515046 - 2460836.5515046 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
497769 2025-06-10 01:14:10 2460836.5515046 19.38 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-06-24 00:54:07 - 2025-06-24 00:54:07 2460850.537581 - 2460850.537581 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
497770 2025-06-24 00:54:07 2460850.537581 18.87 0.07 20.49 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic
cyan-ATLAS ATLAS-MLO_ATLAS-01 2025-06-25 09:37:40 - 2025-06-25 09:37:40 2460851.90116 - 2460851.90116 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
498673 2025-06-25 09:37:40 2460851.90116 19.24 ABMag cyan-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-06-26 07:34:46 - 2025-06-26 07:34:46 2460852.81581 - 2460852.81581 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
498674 2025-06-26 07:34:46 2460852.81581 18.238 0.081 19.48 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
w-P1 PS1_GPC1 2025-06-24 08:28:47 - 2025-06-24 08:28:47 2460850.85332 - 2460850.85332 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
498849 2025-06-24 08:28:47 2460850.85332 18.78 0.03 22 ABMag w-P1 PS1_GPC1 45 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
260334 2025-06-27 18:49:37 PS1_Bot1 K. C. Chambers, T. de Boer, J. Fairlamb et al. Pan-STARRS Pan-STARRS 14:47:01.556 +13:40:10.38 2025-06-24 08:28:46.848 18.78 w-P1 PSN PS25dqi Pan-STARRS N
260246 2025-06-27 08:02:36 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 14:47:01.531 +13:40:10.64 2025-06-26 07:34:45.984 18.238 orange-ATLAS PSN ATLAS25gof ATLAS N
260224 2025-06-27 06:57:59 GOTO_bot A. Kumar, G. Ramsay, K. Ackley et al. GOTO GOTO 14:47:01.557 +13:40:10.86 2025-06-22 21:39:41.184 19.42 L-GOTO Other GOTO25ehx GOTO This transient was discovered with the assistance of the GOTO Kilonova Seekers Citizen Scientists on Zooniverse. The candidate was flagged by volunteers: Lucia Maria Ferreira Lima , Virgilio Gonano, Ciro Sirio Perrella, Rosemary Billington, Mayahuel Torres Guerrero N
259850 2025-06-24 06:46:02 BlackGEM_Bot1 G. Ramsay, H. Tranin, F. Stoppa et al. BlackGEM BlackGEM 14:47:01.566 +13:40:10.16 2025-06-24 00:54:07.000 18.87 BG-q-BlackGem 1 PSN BGEM J144701.56+134010.1 BlackGEM 2025TNSTR2372....1R N
Related files
File Comments Last Modified (UT) Modified By
tns_2025otl_atrep_259850_BlackGEM.pdf Finding Chart 2025-06-24 06:46:05 BlackGEM_Bot1
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21420 2025-06-28 07:54:17 Willem Hoogendam Willem Hoogendam (IfA/Hawaii), on behalf of SCAT SCAT SN Ia-91bg-like 0.030389 1 SCAT SN Ia with spectroscopic signatures similar to a 91bg-like (strong O I, secondary Si II, and likely Ti II trough). SNID best match is to SN 1999by. The redshift is from NED. 2025TNSCR2460....1H
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
21420 2025-06-28 00:00:00 UH88 / SNIFS 1800 Hoogendam Hoogendam SCAT tns_2025otl_2025-06-28_UH88_SNIFS_SCAT.dat Object

Comments

TNS
System

Fri, 06/27/2025 - 18:49

Object coordinates updated

Object coordinates updated according to AT-report 260334 of Group Pan-STARRS
Previous RA, DEC: 14:47:01.566, +13:40:10.16 (221.756525, +13.669489)
Updated RA, DEC: 14:47:01.556, +13:40:10.38 (221.756481772, +13.6695506607)