RA/DEC (2000)
01:43:00.374 -34:11:35.13
25.751558 -34.193092
Type
SN IIP
Redshift
0.0139
Discovery ReportClassification Report
Related AstroNotes: 2025-321
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-11-02 08:31:22.368
TNS AT
Y
Public
Y
Discovery Mag
18.401
Filter
orange-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), M. R. Alarcón, J. Licandro, P. Nichita (IAC), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill, P. J. Broda (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025acfm - 2025-11-10 22:57:10 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-4_L
 ▌GOTO-S_GOTO-3_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌BG3_BlackGEM-Cam3_BG-q
 ▌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
22398 2025-11-10 22:57:10 NOT / ALFOSC 1200 Various Marco A. Gomez-Muñoz BlackGEM tns_2025acfm_2025-11-10_22-57-10_NOT_ALFOSC_BlackGEM.txt Object Reduced using pypeit
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-10-24 12:48:28 - 2025-10-24 12:48:28 2460973.033658 - 2460973.033658 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
531526 2025-10-24 12:48:28 2460973.033658 19.9 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
L-GOTO GOTO-S_GOTO-3 2025-11-16 16:00:51 - 2025-11-16 16:00:51 2460996.167263 - 2460996.167263 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
531527 2025-11-16 16:00:51 2460996.167263 17.75 0.03 ABMag L-GOTO GOTO-S_GOTO-3 360
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-10-30 02:25:12 - 2025-10-30 02:25:12 2460978.60083 - 2460978.60083 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
528587 2025-10-30 02:25:12 2460978.60083 19.02 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-11-06 01:45:53 - 2025-11-09 01:42:55 2460985.5735301 - 2460988.5714699 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
529747 2025-11-09 01:42:55 2460988.5714699 17.89 0.04 20.58 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic
529746 2025-11-06 01:45:53 2460985.5735301 18.93 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-11-02 08:31:22 - 2025-11-02 08:31:22 2460981.85512 - 2460981.85512 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
528588 2025-11-02 08:31:22 2460981.85512 18.401 0.162 18.56 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
277109 2025-11-16 20:28:23 GOTO_bot D. O'Neill,B. Gompertz,K. Ackley et al. GOTO GOTO 01:43:00.369 -34:11:35.36 2025-11-16 16:00:51.264 17.75 L-GOTO Other GOTO25kec GOTO This transient was discovered with the assistance of the GOTO Kilonova Seekers Citizen Scientists on Zooniverse. The candidate was flagged by volunteers: Henryk Krawczyk, Mayahuel Torres Guerrero, Jose Alberto da Silva Campos, Virgilio Gonano, Antonio Pasqua N
276084 2025-11-09 06:57:02 BlackGEM_Bot1 P. Groot,H. Tranin,F. Stoppa et al. BlackGEM BlackGEM 01:43:00.374 -34:11:35.13 2025-11-09 01:42:55.000 17.89 BG-q-BlackGem PSN BGEM J014300.37-341135.1 BlackGEM N
275555 2025-11-03 09:38:22 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 01:43:00.326 -34:11:34.76 2025-11-02 08:31:22.368 18.401 orange-ATLAS PSN ATLAS25nsq ATLAS 2025TNSTR4418....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22397 2025-11-11 14:30:49 Hugo Tranin Hugo Tranin (ICCUB), Marco A. Gomez-Muñoz (ICCUB), Giorgos Leloudas (DTU Space), N. Blagorodnova (ICCUB) BlackGEM SN IIP 0.0139 1 1 BlackGEM, CET-3PO Classified with SNID SAGE as SN II-P, with high confidence. RLAP=15.2 Redshift: 0.0139 ± 0.0003 (consistent with the spectroscopic redshift of the host IC 1722) Median age of matched templates: 10 days 2025TNSCR4532....1T
Related files
File Comments Last Modified (UT) Modified By
tns_2025acfm_atrep_22397_BlackGEM.jpg 2025-11-11 14:30:49 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
22398 2025-11-10 22:57:10 NOT / ALFOSC 1200 Various Marco A. Gomez-Muñoz BlackGEM tns_2025acfm_2025-11-10_22-57-10_NOT_ALFOSC_BlackGEM.txt Object Reduced using pypeit

Comments

TNS
System

Sun, 11/09/2025 - 06:57

Object coordinates updated

Object coordinates updated according to AT-report 276084 of Group BlackGEM
Previous RA, DEC: 01:43:00.326, -34:11:34.76 (25.7513566667, -34.19299)
Updated RA, DEC: 01:43:00.374, -34:11:35.13 (25.751558, -34.193092)