RA/DEC (2000)
03:54:36.800 -26:53:37.36
58.6533342857 -26.8937114286
Type
SN Ia
Redshift
0.078
Related AstroNotes: 2025-249
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-07-24 18:14:10.176
TNS AT
Y
Public
Y
Discovery Mag
19.21
Filter
L-GOTO
Reporter/s
D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration

Spectra

 SN_2025sax - 2025-08-10 07:29:10 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
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Show [O I] at z=vexp= km/s
Show O II at z=vexp= km/s
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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
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Show Tellurics 
Show Galaxy lines at z=
Show WR-WN at z=vexp= km/s
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   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_cyan
 ATLAS-STH_ATLAS-03_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
21739 2025-08-10 07:29:10 ESO-NTT / EFOSC2-NTT 900 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025sax_2025-08-10_07-29-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025sax_2025-08-10_07-29-10_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 18:42:38 - 2025-07-24 18:14:10 2460875.279606 - 2460881.259842 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
504694 2025-07-24 18:14:10 2460881.259842 19.21 0.07 ABMag L-GOTO GOTO-S_GOTO-4 360
504693 2025-07-18 18:42:38 2460875.279606 19.7 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-07-26 10:29:32 - 2025-07-26 10:29:32 2460882.93718 - 2460882.93718 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
505880 2025-07-26 10:29:32 2460882.93718 17.24 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
orange-ATLAS ATLAS-STH_ATLAS-03 2025-07-28 03:00:31 - 2025-07-28 03:00:31 2460884.62536 - 2460884.62536 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
505881 2025-07-28 03:00:31 2460884.62536 19.009 0.135 19.44 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 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
264217 2025-07-29 10:59:39 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 03:54:36.800 -26:53:37.36 2025-07-28 03:00:31.104 19.009 orange-ATLAS PSN ATLAS25ikr ATLAS N
263622 2025-07-24 18:50:07 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 03:54:36.756 -26:53:37.61 2025-07-24 18:14:10.176 19.21 L-GOTO Other GOTO25fjf GOTO 2025TNSTR2869....1O N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21739 2025-08-10 12:42:07 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 0.078 1 ePESSTO+ 2025TNSCR3138....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
21739 2025-08-10 07:29:10 ESO-NTT / EFOSC2-NTT 900 Joyce Naomi Dominique van Dalen, Daniele Bjørn Malesani Antonio Martin-Carrillo, Gregory Corcoran, Laura Cotter ePESSTO+ tns_2025sax_2025-08-10_07-29-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025sax_2025-08-10_07-29-10_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 264217 of Group ATLAS
Previous RA, DEC: 03:54:36.756, -26:53:37.61 (58.653152, -26.89378)
Updated RA, DEC: 03:54:36.800, -26:53:37.36 (58.6533342857, -26.8937114286)