AstroNote 2021-99

Primary tabs

DRAFT
2021-03-22 19:52:21
Type: Object/s-Discovery/Classification
adH0cc spectroscopic classification of SN 2021fwa
Authors: G. Csoernyei, A. Holas, C. Vogl, S. Taubenberger, A. Floers, M. G. Cudmani, W. Hillebrandt, S. H. Suyu (MPA Garching), B. Leibundgut, J. Spyromilio (ESO), S. J. Smartt, M. Dobson (QUB), R. Kotak (Turku), R. Bruch, A. Gal-Yam (Weizmann), C. Lemon (Lausanne), S. Blondin (CNRS, LAM)
Source Group: adH0cc
Abstract:
We have obtained an optical spectrum of SN 2021fwa, which shows it to be a young Type II supernova.

The adH0cc programme for an "accurate determination of H0 with core-collapse supernovae" reports the classification of the optical transient SN 2021fwa. The target was supplied by the Pan-STARRS survey for Transients (Huber et al. 2015, 2015ATel.7153....1). The observations were performed on the night of 2021 March 21 with the ESO Very Large Telescope UT1, equipped with the FORS2 spectrograph and grism 300V, covering a wavelength range from 3400 to 9600 Å at a resolution of 10 Å.

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftSourcePhaseRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2021fwa [PS21bvk]13:00:29.833+07:17:07.87SN II0.04157SDSS J130030.00+071715.80.04157Pan-STARRS14dThe spectrum shows P-Cygni features of H and He, indicative of a young Type II supernova. Template matching with SNID yields a phase of about two weeks after the explosion. This is consistent with the flat Pan-STARRS light curve from 7 to 2 days before the classification. The flat continuum of the spectrum suggests significant interstellar extinction of around E(B-V) ~ 0.5 mag. We adopted the redshift of the host for the SN redshift.13:00:29.833+07:17:07.87SN II0.04157