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spectral classification of 2 PSNe with the Asiago 1.82 telescope

ATel #4672; L. Tomasella, S. Benetti, E. Cappellaro, P. Ochner, A. Pastorello, M. Turatto
on 23 Dec 2012; 15:05 UT
Credential Certification: Lina Tomasella (lina.tomasella@oapd.inaf.it)

Subjects: Optical, Supernovae

We report the spectral classification of 2 supernovae with the Asiago 1.82-m Copernico Telescope (+ AFOSC range 340-820 nm; resolution 1.3 nm). A spectrum of PSN J15035487+4206553 obtained on Dec. 23.10 UT shows that this supernova is characterized by features that are typical of stripped envelope SNe. Adopting for the host galaxy UGC9684 a redshift z=0.016872 (Bottinelli et al. 1993, A&AS 102, 57, via NED), the best match was found with various type Ib/c supernovae some days past maximum. A spectrum of PSN J04424114+1834597 obtained on Dec. 22.98 UT shows that this supernova is a type-Ia at redshift z~0.012. The best match was found with various type-Ia supernovae few days before the maximum light. The expansion velocity as deduced from the position of the Si-II 635.5nm absorption is about 10500 km/s. 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).