TNS Classification Report No. 18882 [ 2024TNSCR4818....1G ]
Date Received (UTC): 2024-12-08 19:19:18 Sender: James Gillanders
Group: OxQUB
J. Gillanders (Oxford), M. Huber (IfA, University of Hawaii), M. Fulton (QUB), S. Smartt (Oxford/QUB) report/s a classification of object: SN 2024adec
Type: SN IIbRedshift: 0.035
Remarks: Spectrum obtained on 2024-12-07 by Gemini-N GMOS-N shows clear evidence of AT2024adec being a SN IIb. We obtain a number of matches (with the SNID software; Blondin & Tonry 2007) to other pre-peak SNe IIb spectra at redshifts between ~0.03-0.04. The early, rapid lightcurve evolution is likely the result of shock cooling. We estimate the redshift to be 0.035 from prominent, narrow host galaxy H-alpha emission.
The following Classification spectrum was provided:
Obsdate: 2024-12-07 14:50:42
Instrument: GMOS
Telescope: Gemini North
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2024adec
Date Received (UTC): 2024-12-08 19:19:18 Sender: James Gillanders
Group: OxQUB
J. Gillanders (Oxford), M. Huber (IfA, University of Hawaii), M. Fulton (QUB), S. Smartt (Oxford/QUB) report/s a classification of object: SN 2024adec
Type: SN IIbRedshift: 0.035
Remarks: Spectrum obtained on 2024-12-07 by Gemini-N GMOS-N shows clear evidence of AT2024adec being a SN IIb. We obtain a number of matches (with the SNID software; Blondin & Tonry 2007) to other pre-peak SNe IIb spectra at redshifts between ~0.03-0.04. The early, rapid lightcurve evolution is likely the result of shock cooling. We estimate the redshift to be 0.035 from prominent, narrow host galaxy H-alpha emission.
The following Classification spectrum was provided:
Obsdate: 2024-12-07 14:50:42
Instrument: GMOS
Telescope: Gemini North
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2024adec