RA/DEC (2000)
05:00:31.742 -62:04:20.45
75.13226 -62.0723466667
Type
SN IIb
Redshift
0.028
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-11-18 13:22:39.360
TNS AT
Y
Public
Y
Discovery Mag
19.46
Filter
L-GOTO
Reporter/s
G. Ramsay, D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025aedy - 2025-12-10 03:54:41 VLT-UT1 / FORS2 (adH0cc)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
22552 2025-12-10 03:54:41 VLT-UT1 / FORS2 900 service G. Csoernyei adH0cc tns_2025aedy_2025-12-10_03-54-41_VLT-UT1_FORS2_adH0cc.asci tns_2025aedy_2025-12-10_03-54-41_VLT-UT1_FORS2_adH0cc.fits Object Quick-reduction spectrum
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-10-27 12:34:49 - 2025-11-18 13:22:39 2460976.024183 - 2460998.057396 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
532403 2025-11-18 13:22:39 2460998.057396 19.46 0.12 ABMag L-GOTO GOTO-S_GOTO-4 180
532402 2025-10-27 12:34:49 2460976.024183 19.2 ABMag L-GOTO GOTO-S_GOTO-4 135 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-11-30 04:09:56 - 2025-11-30 04:09:56 2461009.67356 - 2461009.67356 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
535231 2025-11-30 04:09:56 2461009.67356 18.89 0.198 18.81 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2025-11-29 02:18:27 - 2025-11-29 02:18:27 2461008.59615 - 2461008.59615 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
535230 2025-11-29 02:18:27 2461008.59615 18.72 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
278906 2025-11-30 16:37:49 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland (IfA, University of Hawaii) et al. ATLAS ATLAS 05:00:31.742 -62:04:20.45 2025-11-30 04:09:55.584 18.89 orange-ATLAS PSN ATLAS25pex ATLAS N
277589 2025-11-18 22:34:08 GOTO_bot G. Ramsay, D. O'Neill, K. Ackley et al. GOTO GOTO 05:00:31.655 -62:04:20.28 2025-11-18 13:22:39.360 19.46 L-GOTO Other GOTO25klg GOTO 2025TNSTR4636....1R N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22551 2025-12-10 11:20:13 Geza Csornyei G. Csoernyei, B. Leibundgut, J. Spyromilio, S. Blondin (ESO), S. Taubenberger (TUM / MPA), W. Hillebrandt (MPA) adH0cc SN IIb 0.028 1 1 adH0cc The object shows prominent H and He lines, along with a strong metal-line blanketing in the bluer wavelengths and a well-developed Ca II triplet at an epoch of about two weeks, indicative of a Type IIb supernova. The object exploded in the same host galaxy as the Type Ia supernova SN 2017dfv. The redshift was adopted from NED. 2025TNSCR4918....1C
Related files
File Comments Last Modified (UT) Modified By
tns_2025aedy_atrep_22551_adH0cc.png 2025-12-10 11:20:14 Geza Csornyei
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
22552 2025-12-10 03:54:41 VLT-UT1 / FORS2 900 service G. Csoernyei adH0cc tns_2025aedy_2025-12-10_03-54-41_VLT-UT1_FORS2_adH0cc.asci tns_2025aedy_2025-12-10_03-54-41_VLT-UT1_FORS2_adH0cc.fits Object Quick-reduction spectrum

Comments

TNS
System

Sun, 11/30/2025 - 16:37

Object coordinates updated

Object coordinates updated according to AT-report 278906 of Group ATLAS
Previous RA, DEC: 05:00:31.655, -62:04:20.28 (75.131896, -62.072299)
Updated RA, DEC: 05:00:31.742, -62:04:20.45 (75.13226, -62.0723466667)