RA/DEC (2000)
20:38:09.550 -31:35:44.09
309.539791532 -31.5955799467
Type
SN Ia
Redshift
0.071
Discovery ReportClassification Report
Related AstroNotes: 2025-253
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-08-10 22:36:55.584
TNS AT
Y
Public
Y
Discovery Mag
18.411
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_2025tmc - 2025-08-12 06:17:28 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
21772 2025-08-12 06:17:28 ESO-NTT / EFOSC2-NTT 600 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025tmc_2025-08-12_06-17-28_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025tmc_2025-08-12_06-17-28_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-07-18 14:07:38 - 2025-08-12 15:21:03 2460875.088641 - 2460900.139618 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508295 2025-08-12 15:21:03 2460900.139618 18.3 0.1 ABMag L-GOTO GOTO-S_GOTO-4 180
508294 2025-07-18 14:07:38 2460875.088641 19 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-08-06 03:15:57 - 2025-08-06 03:15:57 2460893.63608 - 2460893.63608 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508020 2025-08-06 03:15:57 2460893.63608 18.52 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
orange-ATLAS ATLAS-STH_ATLAS-03 2025-08-10 22:36:56 - 2025-08-10 22:36:56 2460898.44231 - 2460898.44231 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508021 2025-08-10 22:36:56 2460898.44231 18.411 0.121 19.29 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 110 Robot
w-P1 PS1_GPC1 2025-08-01 09:21:22 - 2025-08-01 09:21:22 2460888.88984 - 2460888.88984 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
508503 2025-08-01 09:21:22 2460888.88984 20.22 0.1 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
265679 2025-08-13 14:36:43 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 20:38:09.550 -31:35:44.09 2025-08-01 09:21:22.176 20.22 w-P1 PSN PS25ghq Pan-STARRS N
265577 2025-08-12 19:31:47 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 20:38:09.551 -31:35:44.34 2025-08-12 15:21:03.168 18.3 L-GOTO Other GOTO25fst GOTO N
265376 2025-08-11 10:16:57 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 20:38:09.552 -31:35:44.25 2025-08-10 22:36:55.584 18.411 orange-ATLAS PSN ATLAS25jfi ATLAS 2025TNSTR3142....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
21772 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 0.071 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
21772 2025-08-12 06:17:28 ESO-NTT / EFOSC2-NTT 600 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025tmc_2025-08-12_06-17-28_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025tmc_2025-08-12_06-17-28_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Wed, 08/13/2025 - 14:36

Object coordinates updated

Object coordinates updated according to AT-report 265679 of Group Pan-STARRS
Previous RA, DEC: 20:38:09.552, -31:35:44.25 (309.53979875, -31.59562375)
Updated RA, DEC: 20:38:09.550, -31:35:44.09 (309.539791532, -31.5955799467)