RA/DEC (2000)
20:29:44.321 -57:57:19.91
307.434672 -57.95553
Type
SN Ia
Redshift
0.06
Related AstroNotes: 2025-157
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-05-23 15:27:50.976
TNS AT
Y
Public
Y
Discovery Mag
18.69
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_2025lkw - 2025-05-26 07:10:39 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_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
21144 2025-05-26 07:10:39 ESO-NTT / EFOSC2-NTT 900 Callum Francis Aster, Stefano Pio Cosentino Amar Aryan, Ting-Wan Chen, Yu-Hsing Lee, Cheng-Han Lai ePESSTO+ tns_2025lkw_2025-05-26_07-10-39_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025lkw_2025-05-26_07-10-39_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-05-17 14:49:45 - 2025-05-23 15:27:51 2460813.117878 - 2460819.144336 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490463 2025-05-23 15:27:51 2460819.144336 18.69 0.08 ABMag L-GOTO GOTO-S_GOTO-4 270
490462 2025-05-17 14:49:45 2460813.117878 18.2 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-05-25 08:59:16 - 2025-05-25 08:59:16 2460820.87449 - 2460820.87449 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491370 2025-05-25 08:59:16 2460820.87449 18.677 0.138 19.26 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2025-05-23 02:35:46 - 2025-05-23 02:35:46 2460818.60817 - 2460818.60817 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491369 2025-05-23 02:35:46 2460818.60817 19.35 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
256667 2025-05-25 17:31:30 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 20:29:44.321 -57:57:19.91 2025-05-25 08:59:15.936 18.677 cyan-ATLAS PSN ATLAS25fnq ATLAS N
256114 2025-05-23 16:15:47 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 20:29:44.350 -57:57:20.68 2025-05-23 15:27:50.976 18.69 L-GOTO Other GOTO25cyg GOTO 2025TNSTR1916....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
21144 2025-05-26 16:54:26 ePESSTOplus_Bot1 Callum Francis Aster, Stefano Pio Cosentino, Amar Aryan, Ting-Wan Chen, Yu-Hsing Lee, Cheng-Han Lai, A. Horowicz on behalf of ePESSTO+ ePESSTO+ SN Ia 0.06 1 ePESSTO+ 2025TNSCR1978....1A
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
21144 2025-05-26 07:10:39 ESO-NTT / EFOSC2-NTT 900 Callum Francis Aster, Stefano Pio Cosentino Amar Aryan, Ting-Wan Chen, Yu-Hsing Lee, Cheng-Han Lai ePESSTO+ tns_2025lkw_2025-05-26_07-10-39_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025lkw_2025-05-26_07-10-39_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 256667 of Group ATLAS
Previous RA, DEC: 20:29:44.350, -57:57:20.68 (307.434793, -57.955745)
Updated RA, DEC: 20:29:44.321, -57:57:19.91 (307.434672, -57.95553)