Carnegie Supernova Project spectral classification of OGLE transients
ATel #4829; N. Morrell, E. Hsiao, M. Phillips, C. Contreras (Las Campanas Observatory, Carnegie Supernova Project), L. Wyrzykowski, A. Udalski, S. Kozlowski (Warsaw University Astronomical Observatory, OGLE project, Poland).
on 20 Feb 2013; 17:31 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Nidia Morrell (nmorrell@lco.cl)
Subjects: Optical, Supernovae
We report optical spectroscopy (range 340-940 nm) of OGLE-2013-SN-014 and OGLE-2013-SN-015 (cf. ATel 4825) obtained at Las Campanas Observatory with the 2.5-m du Pont telescope (+Boller and Chivens) on Feb. 19 UT.
The spectrum of OGLE-2013-SN-014 consists of a blue continuum with strong nebular emission from an underlying H II region at z = 0.037. Hints of
incipient P-Cyg profiles of H-alpha and HeI 587.6-nm seem to be present
suggesting a very young type II supernova.
OGLE-2013-SN-015 is a type Ia supernova near maximum light. Cross correlation with a library of supernova spectra, using the Supernova Identification tool (SNID, Blondin and Tonry 2007, ApJ, 666, 1024) suggests this is a normal type Ia supernova, at z = 0.09, similar to 2006gj at 1 day before maximum brightness. From absorption lines in the spectrum of the host galaxy we derive a redshift of 0.088 +/- 0.001. Adopting this redshift, the minimum of the Si II 635.5-nm absorption appears blueshifted by roughly 10800 km/s.
