Asiago spectroscopic classification of SN 2020nbv
ATel #13848; P. Ochner (Padova University), A. Pastorello (INAF - PAdova Observatory)
on 1 Jul 2020; 22:23 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Andrea Pastorello (andrea.pastorello@oapd.inaf.it)
Subjects: Optical, Supernovae, Transient
On the behalf of the Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841), we report the spectroscopic classification of SN 2020nbv in NGC 4457, discovered by Koichi Itagaki.
The observation was performed with the Asiago 1.22 m Galileo Galilei Telescope equipped with the B&C spectrograph (range 330-790 nm; resolution 0.7 nm).
Survey Name | Discovery date (UT) | Discovery mag | Observation (UT) | Type | z | Notes|
SN 2020nbv | 2020-07-01.55 | 13 (clear) | 2017-07-01.85 | SN Ia | 0.002939 | (1) |
(1) The spectrum is similar to that of the Type Ia SN 2004eo (Pastorello et al. 2007, MNRAS, 377, 1531) a few days before the maximum light. The redshift is taken from Cortes et al. 2015, ApJS, 216, 9. The expansion velocity of the ejecta, as determined from the position of the P Cygni minimum of the Si II 635.5 nm line, is about 13000 km/s.
The classification made use of GELATO (Harutyunyan et al. 2008, A&A, 488, 383) and SNID (Blondin and
Tonry 2007, ApJ, 666, 1024). The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it .
