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Spectra classification of three PSN with the Asiago 1.82 telescope

ATel #4681; L. Tomasella, S. Benetti, E. Cappellaro, P. Ochner, A. Pastorello, M. Turatto (INAF, Osservatorio Astronomico di Padova)
on 27 Dec 2012; 08:48 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Stefano Benetti (stefano.benetti@oapd.inaf.it)

Subjects: Supernovae

We report the spectroscopic classification of three PSN obtained with the Asiago 1.82-m Copernico Telescope (+ AFOSC, range 340-820 nm; resolution 1.3 nm) on Dec. 27.0 UT. PSN J02242235+4051032 is a type-Ia at redshift z~0.048. The best match was found with various type-Ia supernovae about one week after the maximum light. The expansion velocity as deduced from the position of the Si-II 635.5nm absorption is about 11000 km/s. PSN J06564291+4854103 is a type-Ia. Adopting for the host galaxy PGC19908 the redshift z = 0.019320 (Falco et al. 1999, PASP 111, 438, via NED), the best fit is obtained with type-Ia supernovae 2007bm and 1999gp (Krisciunas et al. 2001, AJ 122, 1616) about three weeks after maximum light. The expansion velocity as deduced from the position of the Si-II 635.5nm absorption is about 8600 km/s. PSN J11173029+5124074 is a type-Ia. Adopting for the host galaxy PGC34479 the redshift z = 0.033338 (SDSS Data release 2, 2004, via NED) the best match was found with various type-Ia supernovae and in particular with supernova 2003du (Anapuma et al., 2005, A&A 429, 667) about six weeks after the maximum light. The Asiago classification spectra are posted at this website: URL http://graspa.oapd.inaf.it ; classification was made via GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry 2007, Ap.J. 666, 1024).