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Asiago spectroscopic classification of three supernovae

ATel #5742; L. Tartaglia, A. Pastorello, S. Benetti, E. Cappellaro, L. Tomasella, P. Ochner, N. Elias-Rosa and M. Turatto (Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica)
on 9 Jan 2014; 08:25 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Lina Tomasella (lina.tomasella@oapd.inaf.it)

Subjects: Optical, Supernovae

Referred to by ATel #: 5763, 5764, 5915

We report the spectroscopic confirmation of three supernovae with observations obtained at the 1.82-m Copernico Telescope in Asiago (+ AFOSC; range 340-820 nm, resolution 1.3 nm).

A spectrogram of PSN J22370560+3424319 obtained on Jan 08.32 UT shows that this is a type-Ib supernova. Adopting for the host galaxy NGC 7331 a redshift z = 0.002722 (Springob et al. 2005, ApJS, 160, 149; via NED), good matches are obtained with the type-Ib supernovae 1999dn (Benetti et al. 2011, MNRAS, 411, 2726) and 1999ex (Hamuy et al. 2002, AJ, 124, 417) around maximum light.

A spectrogram of PSN J121036761+184935 obtained on Jan. 09.09 UT shows that it is a type Ia supernova. Adopting for the host galaxy UGC 7170 a redshift z = 0.008179 (Giovanelli et al. 1997, AJ, 114, 122; via NED), a good match is obtained with the normal type Ia SN 1994D (Patat et al. 1996, MNRAS, 278, 111) 2 days before the maximum light. The expansion velocity of the ejected material, as inferred from the position of the minimum of the Si II line at 6355A, is 10300 km/s.

A spectrogram of PSN J12033124+0202357 obtained on Jan. 09.13 UT shows that it is a type Ia supernova. Adopting for the host galaxy UGC 7034 a redshift z = 0.018906 (Smith et al. 2004, AJ, 128, 1558; via NED), a good match is obtained with the type Ia SN 2004eo (Pastorello et al. 2007, MNRAS, 377, 1531) a few days before the B-band maximum light. The expansion velocity of the ejected material, as inferred from the position of the minimum of the Si II line at 635.5 nm, is 12200 km/s.

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).

Padova-Asiago SN group