RA/DEC (2000)
19:08:51.668 -48:32:04.79
287.215283 -48.534663
Type
SN Ia
Redshift
0.05
Discovery ReportClassification Report
Related AstroNotes: 2026-136
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2026-05-09 16:56:10.752
TNS AT
Y
Public
Y
Discovery Mag
17.86
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, R. Starling, B. Gompertz, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2026mfm - 2026-05-15 07:34:18 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-CHL_ATLAS-04_cyan
   
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
23720 2026-05-15 07:34:18 ESO-NTT / EFOSC2-NTT 600 J. Khaulsay, J. Quirola-Vasquez C. Aster ePESSTO+ tns_2026mfm_2026-05-15_07-34-18_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2026mfm_2026-05-15_07-34-18_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2026-04-27 18:10:58 - 2026-05-09 16:56:11 2461158.257611 - 2461170.205685 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
581595 2026-05-09 16:56:11 2461170.205685 17.86 0.02 ABMag L-GOTO GOTO-S_GOTO-4 180
581594 2026-04-27 18:10:58 2461158.257611 20.4 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2026-05-04 06:36:19 - 2026-05-04 06:36:19 2461164.77522 - 2461164.77522 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
582306 2026-05-04 06:36:19 2461164.77522 18.76 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
cyan-ATLAS ATLAS-CHL_ATLAS-04 2026-05-13 05:15:19 - 2026-05-13 05:15:19 2461173.71897 - 2461173.71897 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
582307 2026-05-13 05:15:19 2461173.71897 17.322 0.029 19.62 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 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
303616 2026-05-14 09:18:06 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 19:08:51.668 -48:32:04.79 2026-05-13 05:15:19.008 17.322 cyan-ATLAS PSN ATLAS26fnx ATLAS N
303296 2026-05-11 17:20:27 GOTO_bot D. O'Neill, K. Ackley, M. Dyer et al. GOTO GOTO 19:08:51.653 -48:32:04.71 2026-05-09 16:56:10.752 17.86 L-GOTO Other GOTO26epc GOTO 2026TNSTR2042....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
23717 2026-05-15 15:25:29 ePESSTOplus_Bot1 J. Khaulsay, J. Quirola-Vasquez, C. Aster, O. Yaron on behalf of ePESSTO+ ePESSTO+ SN Ia 0.05 1 ePESSTO+ 2026TNSCR2120....1K
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
23720 2026-05-15 07:34:18 ESO-NTT / EFOSC2-NTT 600 J. Khaulsay, J. Quirola-Vasquez C. Aster ePESSTO+ tns_2026mfm_2026-05-15_07-34-18_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2026mfm_2026-05-15_07-34-18_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

TNS
System

Thu, 05/14/2026 - 09:18

Object coordinates updated

Object coordinates updated according to AT-report 303616 of Group ATLAS
Previous RA, DEC: 19:08:51.653, -48:32:04.71 (287.215219, -48.534642)
Updated RA, DEC: 19:08:51.668, -48:32:04.79 (287.215283, -48.534663)