RA/DEC (2000)
18:17:06.321 -54:32:51.12
274.2763375 -54.5475325
Type
SN Ia
Redshift
0.06
Related AstroNotes: 2025-228
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-07-13 13:47:31.488
TNS AT
Y
Public
Y
Discovery Mag
18.27
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_2025rby - 2025-07-24 02:48:45 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
   
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
21621 2025-07-24 02:48:45 ESO-NTT / EFOSC2-NTT 600 G. Martins, R. Santos S. González-Gaitán, J. Duarte ePESSTO+ tns_2025rby_2025-07-24_02-48-45_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025rby_2025-07-24_02-48-45_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-06-28 10:18:05 - 2025-07-13 13:47:31 2460854.929224 - 2460870.074665 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
502456 2025-07-13 13:47:31 2460870.074665 18.27 0.11 ABMag L-GOTO GOTO-S_GOTO-4 180
502455 2025-06-28 10:18:05 2460854.929224 19.8 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-07-16 04:18:07 - 2025-07-16 04:18:07 2460872.67925 - 2460872.67925 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
503065 2025-07-16 04:18:07 2460872.67925 17.974 0.086 19.03 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2025-07-14 02:17:48 - 2025-07-14 02:17:48 2460870.59569 - 2460870.59569 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
503064 2025-07-14 02:17:48 2460870.59569 18.41 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
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
262797 2025-07-17 09:48:29 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 18:17:06.321 -54:32:51.12 2025-07-16 04:18:07.200 17.974 orange-ATLAS PSN ATLAS25hsc ATLAS N
262455 2025-07-14 12:58:33 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 18:17:06.301 -54:32:51.12 2025-07-13 13:47:31.488 18.27 L-GOTO Other GOTO25evx GOTO 2025TNSTR2688....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
21621 2025-07-24 19:15:51 ePESSTOplus_Bot1 G. Martins, R. Santos, S. González-Gaitán, J. Duarte, O. Yaron on behalf of ePESSTO+ ePESSTO+ SN Ia 0.06 1 ePESSTO+ 2025TNSCR2879....1M
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
21621 2025-07-24 02:48:45 ESO-NTT / EFOSC2-NTT 600 G. Martins, R. Santos S. González-Gaitán, J. Duarte ePESSTO+ tns_2025rby_2025-07-24_02-48-45_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025rby_2025-07-24_02-48-45_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 262797 of Group ATLAS
Previous RA, DEC: 18:17:06.301, -54:32:51.12 (274.276255, -54.547534)
Updated RA, DEC: 18:17:06.321, -54:32:51.12 (274.2763375, -54.5475325)