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PSN J03333599-3607377 in NGC 1365 is a Young Type Ia Supernova

ATel #4525; M. Childress, G. Zhou, B. Tucker, D. Bayliss, R. Scalzo, F. Yuan, B. Schmidt (Australian National University)
on 28 Oct 2012; 22:08 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Michael Childress (mjc@mso.anu.edu.au)

Subjects: Optical, Supernovae

We obtained a spectrum of PSN J03333599-3607377 in NGC 1365 (see Klotz & Conseil ATel #4523) on 2012 October 28.53 with the Wide Field Spectrograph (WiFeS - Dopita et al., 2007, ApSS, 310, 255) on the ANU 2.3m telescope at Siding Spring Observatory, NSW Australia, using the B3000/R3000 gratings (3600-10000 A, 1 A resolution). The object displays clear signatures of a young Type Ia Supernova, including the Si 6355 line observed at 5910 (22,000 km/s), and broad high velocity Ca IR triplet observed at 7700. The object spectrum was compared to supernova spectral templates using SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) and the best SN Ia match was SN 2001W at -11 days and redshift z=0.