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PSN J09063070-7549015 is a young SN Ia

ATel #4713; N. Morrell, E. Y. Hsiao, M. M. Phillips, C. Contreras (Las Campanas Observatory), K. Krisciunas (Texas A&M University), J. L. Prieto (Princeton University), S. Parker (Backyard Observatory Supernova Search)
on 7 Jan 2013; 18:21 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Eric Hsiao (hsiao@lco.cl)

Subjects: Optical, Supernovae

We report that an optical spectrum (range 359-960 nm) of J09063070-7549015 obtained on January 7.17 UT with the Las Campanas 2.5-m du Pont telescope (+WFCCD) shows that it is a type Ia supernova approximately a week before maximum brightness. Cross correlation with a library of supernova spectra via the Supernova Identification tool (Blondin and Tonry 2007, ApJ 1024, 666) yields very good matches with many normal type Ia supernovae at 6 to 11 days prior to maximum. An expansion velocity of approximately 15200 km/s is inferred from the minimum of the Si II 635.5-nm absorption, using the redshift of 0.015487 for the assumed host galaxy ESO 036- G 019 (HI Parkes All Sky Survey Final Catalog, quoted by NED). Photometry obtained on the same night with the 1-m Swope telescope yields a visual magnitude of V=17.0 on January 7.11 UT.