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Asiago spectroscopic classification of ASASSN-15db

ATel #7089; P. Ochner, A. Pastorello, S. Benetti, E. Cappellaro, N. Elias-Rosa, L. Tartaglia, G. Terreran, L. Tomasella, M. Turatto (INAF - Osservatorio Astronomico di Padova)
on 17 Feb 2015; 14:09 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Enrico Cappellaro (enrico.cappellaro@oapd.inaf.it)

Subjects: Optical, Supernovae

The Asiago Transient Classification Program (Tomasella et al. 2014, AN, 335, 841) reports the spectroscopic observation of ASASSN-15db in NGC 5996. The observation was performed with the Asiago 1.82m Copernico Telescope (+AFOSC; range 340-820 nm; resolution 1.4 nm), equipped with the CCD Andor IKON L936.

Name        | Date (UT)    |  z           |   Type |   Phase  | 
ASASSN-15db |  20150217.09 |  0.010998    |  SN Ia | -5 days   | 

We confirm the spectroscopic classification reported in ATEL #7086, with ASASSN-15db being a normal Type Ia SN a few days before the maximum light. From the position of the minimum of the Si II 635.5 nm feature, we infer a velocity of about 10900 km/s for the ejected material.

Classification was 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.