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Asiago spectroscopic classification of two supernovae

ATel #6210; P. Ochner, A. Pastorello, S. Benetti, E. Cappellaro, N. Elias-Rosa, L. Tomasella and M. Turatto (INAF - Osservatorio Astronomico di Padova)
on 8 Jun 2014; 17:26 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: N. Elias-Rosa (nancy.elias@oapd.inaf.it)

Subjects: Optical, Supernovae

Referred to by ATel #: 6218

We report the spectroscopic confirmation of two supernovae with observations obtained at the 1.82-m Copernico Telescope in Asiago (+ AFOSC; range 335-785 nm; resolution 0.9 nm).

A spectrogram of PSN J14354590+2443179 obtained on June 07.97 UT shows that this is a type Ia supernova. Assuming a recessional velocity of 10820 km/s for the host galaxy UGC 9396 (SDSS DR6 2007; via NED) a good match is found with several normal SNe Ia few days after B-band maximum light. An expansion velocity of 10150 km/s is derived from the minimum of the Si II 635-nm line.

A spectrogram of PSN J17423216+6735418 obtained on June 08.04 UT shows that this is a type Ia supernova. Assuming a recessional velocity of 12371 km/s for the host galaxy NGC 6456 (Huchra et al 2012, ApJS, 199, 26; via NED) a good match is found with several normal SNe Ia about one week after B-band maximum light. An expansion velocity of 9350 km/s is derived from the minimum of the Si II 635-nm line.

The Asiago classification spectra are posted at this website: URL http://sngroup.oapd.inaf.it ; classification(s) was(were) made via GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry 2007, Ap.J. 666, 1024).