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FIRE spectroscopic classifications of optical transients

ATel #4948; E. Y. Hsiao (LCO), F. Forster (Universidad de Chile), G. H. Marion (Harvard-CfA), N. Morrell (LCO)
on 3 Apr 2013; 23:06 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Eric Hsiao (hsiao@lco.cl)

Subjects: Infra-Red, Optical, Supernovae

We report two spectroscopic classifications using near-infrared spectra (range 800-2400 nm) obtained with the FoldedPort Infrared Echellette (FIRE) spectrograph on the 6.5-m Magellan Baade Telescope. Classifications were done comparing the near-infrared spectra to the library of Marion et al. 2009, A.J. 138, 727. All redshifts are from the presumed hosts and approximately match the supernova redshifts.

Name                  | Source    | Host z | Type | Spec date | Best Match      | Notes 
PSN J13102131-0710241 | SNhunt178 | 0.022  | Ia   | Apr 3.31  | SN2005am at -4d | 1 
PSN J15425813-1823472 | SNhunt179 | 0.034  | IIb  | Apr 3.35  | SN2011dh at 12d | 2 
Note 1. SNhunt178 has strong Ca II triplet, O I and Mg II features, and is likely subluminous. It was reported as a 91bg-like SN Ia by ATel #4940
Note 2. SNhunt179 shows H Paschen lines and He I lines.