RA/DEC (2000)
20:31:36.520 -44:12:22.70
307.902167 -44.206306
Type
SN II
Redshift
0.02217
Discovery ReportClassification Report
Related AstroNotes: 2025-93
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-03-20 09:06:52.128
TNS AT
Y
Public
Y
Discovery Mag
18.144
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), 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 (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_2025ezt - 2025-05-06 19:12:00 ANU-2.3m / WiFeS (DEBASS)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

 ▌ATLAS-CHL_ATLAS-04_orange
 ▌ATLAS-STH_ATLAS-03_orange
 ▌BG4_BlackGEM-Cam4_BG-q
 ▌BG3_BlackGEM-Cam3_BG-q
   
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
20987 2025-05-06 19:12:00 ANU-2.3m / WiFeS 1200 Robotic Bailey Martin DEBASS tns_2025ezt_2025-05-06.8_ANU-2.3m_WiFeS_DEBASS.dat tns_2025ezt_2025-05-06.8_ANU-2.3m_WiFeS_DEBASS.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-03-20 09:06:52 - 2025-03-20 09:06:52 2460754.87977 - 2460754.87977 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
477194 2025-03-20 09:06:52 2460754.87977 18.144 0.137 18.63 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2024-11-19 18:45:22 - 2024-11-19 18:45:22 2460634.2815 - 2460634.2815 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
477193 2024-11-19 18:45:22 2460634.2815 17.75 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
BG-q-BlackGem BG4_BlackGEM-Cam4 2024-10-19 01:27:30 - 2024-10-19 01:27:30 2460602.5607639 - 2460602.5607639 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
483966 2024-10-19 01:27:30 2460602.5607639 20.6 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-03-31 09:58:46 - 2025-03-31 09:58:46 2460765.9158102 - 2460765.9158102 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
483967 2025-03-31 09:58:46 2460765.9158102 19.51 0.13 20.34 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic
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
252548 2025-04-24 13:40:23 BlackGEM_Bot1 F. Stoppa, H. Tranin, D. Pieterse et al. BlackGEM BlackGEM 20:31:36.520 -44:12:22.70 2025-03-31 09:58:46.000 19.51 BG-q-BlackGem 1 PSN BGEM J203136.52-441222.7 BlackGEM N
Related files
File Comments Last Modified (UT) Modified By
tns_2025ezt_atrep_252548_BlackGEM.pdf Finding Chart 2025-04-24 13:41:43 BlackGEM_Bot1
249047 2025-03-20 12:01:00 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 20:31:36.501 -44:12:22.90 2025-03-20 09:06:52.128 18.144 orange-ATLAS PSN ATLAS25cuv ATLAS 2025TNSTR1059....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
20987 2025-05-07 23:59:46 Bailey Martin B. Martin (ANU), K. Auchettl (University of Melbourne/UCSC), B. P. Schmidt (ANU), P. Armstrong (ANU), D. Cao (ANU), C. Lidman (ANU), L. Rauf (ANU), J. Shi (University of Melbourne), and B. E. Tucker (ANU) DEBASS SN II 0.02217 1 1 DEBASS Classified with superfit. The best fitting spectrum is SN1987A, a Type II. 2025TNSCR1703....1M
Related files
File Comments Last Modified (UT) Modified By
tns_2025ezt_atrep_20987_DEBASS.pdf The best fitting spectrum from superfit. 2025-05-07 23:59:46 Bailey Martin
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
20987 2025-05-06 19:12:00 ANU-2.3m / WiFeS 1200 Robotic Bailey Martin DEBASS tns_2025ezt_2025-05-06.8_ANU-2.3m_WiFeS_DEBASS.dat tns_2025ezt_2025-05-06.8_ANU-2.3m_WiFeS_DEBASS.fits Object

Comments

TNS
System

Thu, 04/24/2025 - 13:40

Object coordinates updated

Object coordinates updated according to AT-report 252548 of Group BlackGEM
Previous RA, DEC: 20:31:36.501, -44:12:22.90 (307.9020875, -44.2063625)
Updated RA, DEC: 20:31:36.520, -44:12:22.70 (307.902167, -44.206306)