AstroNote 2020-191

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DRAFT
2020-10-14 15:23:59
Type: Object/s-Discovery/Classification
adH0cc spectroscopic classification of SN 2020ver
Authors: G. Csoernyei, C. Vogl, A. Floers, S. Taubenberger, M. G. Cudmani, A. Holas, 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)
Source Group: adH0cc
Abstract:
We have obtained an optical spectrum of SN 2020ver, which shows it to be a Type Ia supernova seven days before maximum brightness.

The adH0cc programme for an "accurate determination of H0 with core-collapse supernovae" reports the classification of the optical transient SN 2020ver. The target was supplied by the Zwicky Transient Facility ZTF (Kulkarni 2018, 2018ATel11266....1K) and the ATLAS survey (Tonry et al. 2018, 2018PASP..130f4505T). The observations were performed on the night of 2020 October 13 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. The classification was done using GELATO (Harutyunyan et al. 2008, 2008A&A...488..383H).

Show current TNS values
CatalogNameReported RAReported DECReported Obj-TypeReported RedshiftHost NameHost RedshiftPhaseRemarksTNS RATNS DECTNS Obj-TypeTNS Redshift
TNS2020ver [ZTF20achptde]20:54:19.060+09:09:29.06SN Ia0.0906SDSS J205419.14+090925.30.0906-7dThe spectrum is similar to those of normal Type Ia supernovae about a week before B-band maximum. GELATO found good matches with spectra of SN 2003kf at the epochs of -6 and -7 days. The redshift was determined based on the wavelengths of narrow emission lines of the host galaxy.20:54:19.060+09:09:29.06SN Ia0.0906