TNS Classification Report No. 23097 [ 2026TNSCR.848....1C ]
Date Received (UTC): 2026-02-26 12:07:13 Sender: Geza Csornyei
Group: adH0cc
G. Csoernyei, B. Leibundgut, J. Spyromilio, S. Blondin (ESO), S. Taubenberger (TUM / MPA), W. Hillebrandt (MPA) report/s a classification of object: SN 2026dwm
Type: SN IIbRedshift: 0.022
Remarks: The spectrum shows prominent P Cygni features of H and He, along with a strong Ca triplet at early phases, indicative of a Type IIb supernova. We find good matches with the spectra of 1993J a few days after maximum light assuming E(B-V) = 0.3 mag. Redshift measured based on host galaxy emission lines.
The following Classification spectrum was provided:
Obsdate: 2026-02-26 00:57:59
Instrument: FORS2
Telescope: The Very Large Telescope - UT1
Remarks: Quick-reduction spectrum
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2026dwm
Date Received (UTC): 2026-02-26 12:07:13 Sender: Geza Csornyei
Group: adH0cc
G. Csoernyei, B. Leibundgut, J. Spyromilio, S. Blondin (ESO), S. Taubenberger (TUM / MPA), W. Hillebrandt (MPA) report/s a classification of object: SN 2026dwm
Type: SN IIbRedshift: 0.022
Remarks: The spectrum shows prominent P Cygni features of H and He, along with a strong Ca triplet at early phases, indicative of a Type IIb supernova. We find good matches with the spectra of 1993J a few days after maximum light assuming E(B-V) = 0.3 mag. Redshift measured based on host galaxy emission lines.
The following Classification spectrum was provided:
Obsdate: 2026-02-26 00:57:59
Instrument: FORS2
Telescope: The Very Large Telescope - UT1
Remarks: Quick-reduction spectrum
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2026dwm