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FIRE near-infrared spectroscopic classifications of SN 2016dag

ATel #9249; N. Morrell, M. M. Phillips, C. Contreras (Las Campanas Observatory), E. Y. Hsiao (Florida State University) on behalf of the Carnegie Supernova Project (CSP)
on 15 Jul 2016; 21:37 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Eric Hsiao (hsiao@physics.fsu.edu)

Subjects: Infra-Red, Supernovae

We report the spectroscopic classification of SN 2016dag, discovered by the Backyard Observatory Supernova Search (BOSS), using a near-infrared spectrum (range 800-2500 nm) obtained on Jul 14.95 UT with the FoldedPort Infrared Echellette (FIRE) spectrograph on the 6.5-m Magellan Baade Telescope at Las Campanas Observatory. The near-infrared spectrum indicates that SN 2016dag most likely is a type Ia supernova near maximum light. It resembles those of SN 2011fe at a few days before maximum light (Hsiao et al. 2013). Placed at the rest frame of the presumed host ESO-18-G-002 at z=0.01928, SN 2016dag shows high velocity for the Mg II 1.0927 micron line (~13,000 km s-1) and strong Ca II triplet. The remaining spectral features are consistent with a type Ia supernova at maximum light.