Asiago spectroscopic classification of SN 2020gpe and AT 2020hhg
ATel #13640; E. Cappellaro, S. Benetti, L. Tomasella, M. Turatto
on 16 Apr 2020; 08:09 UT
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of SN 2020gpe and AT 2020hhg.
The targets were supplied by the Italian Supernova Search Proget (ISSP, http://italiansupernovae.org ) and Zwicky Transient Facility (https://www.ztf.caltech.edu/; Kulkarni et al. 2018, ATel #11266), and reported in the Transient Name Server (TNS).
The observations were obtained with the Asiago 1.82m Copernico Telescope (+ AFOSC grism#4; range 340-820 nm; resolution 1.4 nm).
Survey name | IAU name | Host galaxy | Disc. Date (UT) | Obs. Date (UT) | redshift | type | phase | notes
AT 2020gpe | SN 2020gpe |NGC 6214 | 2020-04-12 14:01:00.00 | 2020-04-16 00:57:42.8| 0.025414 | II |young| 1
ZTF20aaurhdm | AT 2020hhg | Galactic | 2020-04-14 10:50:44.16 | 2020-04-16 01:46:28.8 | 0 | CV | - | 2
(1)
The spectrum is consistent with those of SN II/IIb few days after explosion. The redshift is from NED .
(2)
The spectrum shows a strong blue continuum and a weak Halpha emission core which is surrounded by broad absorption troughs. Higher Balmer lines, as well as He I features, are in pure absorption.
The classification was performed using the GELATO (Harutyunyan et
al. 2008, A&A, 488, 383)
and SNID (Blondin and Tonry 2007, ApJ,
666, 1024) tools.
The Asiago classification spectra are posted at the website http://sngroup.oapd.inaf.it.
