Asiago spectroscopic classification of two SNe
ATel #6906; L. Tomasella, S. Benetti, E. Cappellaro, N. Elias-Rosa, P. Ochner, A. Pastorello, L. Tartaglia, G. Terreran, M. Turatto (INAF OAPd)
on 13 Jan 2015; 11:27 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Enrico Cappellaro (firstname.lastname@example.org)
Subjects: Optical, Supernovae
The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the
spectroscopic observation of PSN J06574303+1334457 in UGC 3617 and PSN J13183047-1436446 in IC 4221.
Targets were supplied by the Astronomy Section of the Rochester Academy of Sciences (arXiv:1103.5165)
and by the CBAT Transient Objects Confirmation Page (TOCP). The observations were performed with the
Asiago 1.82m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.2 nm) equipped with the CCD
Andor IKON L936.
Name | Date (UT) | z | Type | Phase | Notes
PSN J06574303+1334457 | 20150112.99 | 0.013 | SN II | +10d | (1)
PSN J13183047-1436446 | 20150113.16 | 0.009 | SN II | 3w | (2)
(1) Best match with type-II SNe about two weeks after explosion. Bluewards to the
H-alpha emission, there are two distinct absorptions. Assuming they are both due to H-alpha
(at regular and high velocity) and adopting a recessional velocity of 3984 km/s for the host
galaxy UGC 3617 (HIPASS HI Parkes All Sky Survey 2006; via NED), the inferred expansion velocities
for the two components are 11800 km/s and 18700 km/s, respectively. Since H-beta shows only a
single PCygni absorption, blue-shifted by about 11100 km/s, the bluer absorption near H-alpha
can be most likely attributed to SiII-635.5nm, for which an expansion velocity of about 9800 km/s
(2) Best match with type-II SNe around 3-4 weeks after explosion. Host galaxy IC 4221 redshift
from Catinella et al. 2005 (AJ 130, 1037, via NED).
Classification was done with 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.