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PSN J10000552-3414013 is a young SN Ia

ATel #4707; N. Morrell, E. Y. Hsiao, C. Contreras, M. M. Phillips (Las Campanas Observatory)
on 6 Jan 2013; 08:47 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Eric Hsiao (hsiao@lco.cl)

Subjects: Optical, Supernovae

We report an optical spectrum (range 355-960-nm) of PSN J10000552-3414013 obtained on January 6.16 UT with the 2.5-m du Pont telescope (+WFCCD) at Las Campanas Observatory. Inspection of this data shows that this is a type Ia supernova a week before maximum brightness. Comparison to other spectra with "Superfit" (Howell et al. 2005, Ap.J. 634, 1190) results in an excellent match with SN 1999ee at 8 days before maximum. Assuming for the host galaxy, IC 2532, the NED recession velocity of 2822 km/s (Theureau et al. 1998, A&AS, 130, 333) the minimum of the 635.5-nm Si II absorption appears to be blueshifted by approximately 16000 km/s.