Spectral Classification of PSN J15381795+2544173
ATel #4227; J. M. Silverman, D. P. Cohen, and A. V. Filippenko (University of California, Berkeley)
on 30 Jun 2012; 03:56 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Alexei V. Filippenko (alex@astro.berkeley.edu)
Subjects: Optical, Supernovae
We report that inspection of a noisy CCD spectrum (range 340-1000 nm), obtained on June 27.3 UT with the Shane 3-m reflector (+ Kast spectrograph) at Lick Observatory, shows that PSN J15381795+2544173 (ATEL 4200) is a Type Ia supernova (SN Ia). After removal of the host-galaxy recession velocity of 26,952 km/s (Sloan Digital Sky Survey Data Release 6), we find the absorption minimum of the Si II 635.5-nm line to be blueshifted by about 11,700 km/s. Cross-correlation with a library of SN spectra using the "SuperNova IDentification" code (SNID; Blondin & Tonry 2007, Ap.J. 666, 1024) indicates that the object is a normal SN Ia roughly 4 days past maximum brightness.
