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FIRE NIR spectroscopic classifications of optical transients

ATel #6220; G. H. Marion (University of Texas, Austin, Harvard CfA); E. Y. Hsiao, C. Gall (Aarhus University); R. P. Kirshner (Harvard CfA); M. D. Stritzinger (Aarhus University); C. Contreras, N. Morrell, M. M. Phillips (Las Campanas Observatory)
on 9 Jun 2014; 19:45 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Eric Hsiao (hsiao@lco.cl)

Subjects: Infra-Red, Optical, Supernovae

Referred to by ATel #: 6442

We report 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. Note that the classification of supernova is defined by spectroscopic features in the optical. Classification using NIR features is challenging, since the comparison sample is small. Confirmation in the optical is encouraged.

Name                  Source z     Type  Disc mag Disc date Spec date Notes 
PSN J11220840-3804001 BOSS   0.010 IIb   16.8     May 31.4  Jun 6.1   1,2 
PSN J21431113-3858058 BOSS   0.016 Ibc   16.7     May 31.6  Jun 6.3   1,3 
PSN J22595069-6133222 BOSS   0.028 Ibc   17.1     May 15.7  Jun 6.4   1,4 
PSN J03442399-4440081 Monard 0.004 Ic-BL 14.7     Jun 3.2   Jun 6.4   1,5 
1) All redshifts are from the host galaxies. 
2) Most similar to type IIb (optical classification ATel #5998) LSQ14akx FIRE spectrum taken before maximum light. 
3) Near maximum light. 
4) 2-3 weeks past maximum light. 
5) Previously classified in the optical as Ib (ATel #6201). We observed developed broad features in the NIR, unlike typical SNe Ib.