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

ATel #8381; L. Tomasella, A. Pastorello, S. Benetti, E. Cappellaro, N. Elias-Rosa, P. Ochner, L. Tartaglia, G. Terreran, M. Turatto (INAF Osservatorio Astronomico di Padova)
on 7 Dec 2015; 18:45 UT
Credential Certification: Lina Tomasella (lina.tomasella@oapd.inaf.it)

Subjects: Optical, Supernovae

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic classification of ASASSN-15tn discovered by All Sky Automated Survey for SuperNovae (ASAS-SN) in CGCG 496-51 (Atel#8376).

Information on this transient is available from the "Bright Supernova" website (http://www.rochesterastronomy.org/snimages/). 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 
ASASSN-15tn     | 20151206.280     | 20151207.71  |0.03    |  Ia      | ~max       | (1)  

(1) Best match with several normal Type-Ia SNe, around maximum light. The expansion velocity, as deduced from the position of the minimum of the Si II 635 nm line, is about 12000 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.

Padova Asiago SN group