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Asiago classification of ASASSN-15gt as a Type-Ia SN

ATel #8350; S. Benetti, L. Tomasella, E. Cappellaro, N. Elias-Rosa, P. Ochner, A. Pastorello, L. Tartaglia, G. Terreran, M. Turatto (INAF Osservatorio Astronomico di Padova), Milan, M. (Padua University)
on 1 Dec 2015; 20:06 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)

Subjects: Supernovae

Referred to by ATel #: 8354

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of ASASSN-15gt in GALEXASC J002041.66+251341.1 (ATEL #8347).

The observation was performed with the Asiago 1.82 m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.4 nm).

Name             | Discovery UT     | Obs. Date UT |   z       |   Type   | Phase      |Notes  
ASASS -15gt      | 20151130.21      | 20151201.73  |0.03561    |  Ia      | pre-max    | (1)   

(1) Best match with 1991T-like Type-Ia SNe, around 1 week before B-band maximum light. The expansion velocity, as deduced from the position of the minimum of the Si II 635 nm line, is about 11000 km/s.

Classification were 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.