RA/DEC (2000)
21:31:23.653 -36:56:35.24
322.848554447 -36.9431208621
Type
SN Ia
Redshift
0.031
Discovery ReportClassification Report
Related AstroNotes: 2025-253
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-08-06 03:15:15.840
TNS AT
Y
Public
Y
Discovery Mag
18.339
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 (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_2025tjo - 2025-08-12 03:30:06 ESO-NTT / EFOSC2-NTT (ePESSTO+)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
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌ATLAS-STH_ATLAS-03_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
21771 2025-08-12 03:30:06 ESO-NTT / EFOSC2-NTT 900 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025tjo_2025-08-12_03-30-06_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025tjo_2025-08-12_03-30-06_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-07-24 13:42:08 - 2025-08-17 11:56:14 2460881.07093 - 2460904.997392 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
509747 2025-08-17 11:56:14 2460904.997392 18.59 0.07 ABMag L-GOTO GOTO-S_GOTO-4 180
509746 2025-07-24 13:42:08 2460881.07093 19.8 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-08-06 03:15:16 - 2025-08-06 03:15:16 2460893.6356 - 2460893.6356 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507869 2025-08-06 03:15:16 2460893.6356 18.339 0.183 18.4 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2025-08-03 21:36:19 - 2025-08-03 21:36:19 2460891.40022 - 2460891.40022 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
507868 2025-08-03 21:36:19 2460891.40022 19 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
w-P1 PS1_GPC1 2025-08-26 08:39:00 - 2025-08-26 08:39:00 2460913.86042 - 2460913.86042 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
544203 2025-08-26 08:39:00 2460913.86042 18.9 0.09 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
283189 2025-12-28 20:32:13 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 21:31:23.653 -36:56:35.24 2025-08-26 08:39:00.288 18.9 w-P1 PSN PS25jma Pan-STARRS N
266280 2025-08-17 17:39:09 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 21:31:23.626 -36:56:34.99 2025-08-17 11:56:14.496 18.59 L-GOTO Other GOTO25fvv GOTO N
265279 2025-08-08 23:38:43 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 21:31:23.666 -36:56:35.17 2025-08-06 03:15:15.840 18.339 orange-ATLAS PSN ATLAS25jel ATLAS 2025TNSTR3111....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
21771 2025-08-12 12:32:44 ePESSTOplus_Bot1 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani, Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter, E. A. Zimmerman on behalf of ePESSTO+ ePESSTO+ SN Ia 0.031 1 ePESSTO+ 2025TNSCR3171....1v
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
21771 2025-08-12 03:30:06 ESO-NTT / EFOSC2-NTT 900 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025tjo_2025-08-12_03-30-06_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025tjo_2025-08-12_03-30-06_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Sun, 12/28/2025 - 20:32

Object coordinates updated

Object coordinates updated according to AT-report 283189 of Group Pan-STARRS
Previous RA, DEC: 21:31:23.666, -36:56:35.17 (322.8486075, -36.9431025)
Updated RA, DEC: 21:31:23.653, -36:56:35.24 (322.848554447, -36.9431208621)