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Spectroscopic confirmation of DES12S2b

ATel #4826; S. B. Cenko, K. I. Clubb (University of California, Berkeley), G. Aldering, J. S. Bloom, A. Kim, P. Nugent, S. Perlmutter, R. C. Thomas (Lawrence Berkeley National Laboratory), S. Desai, K. Paech (Ludwig Maximilians University, Munich), R. C. Smith (NOAO/CTIO), R. Kessler (University of Chicago), R. A. Covarrubias (University of Illinois / NCSA), R. Cane, J. A. Fischer, S. Gilhool, L. Gladney, R. Gupta, J. Mosher, M. Sako (University of Pennsylvania), P. J. Brown, K. Krisciunas, J. Marshall, N. Suntzeff (Texas A&M University), H. Campbell, C. D'Andrea, R. Nichol, A. Papadopoulos (University of Portsmouth), M. Sullivan (University of Southampton), M. March (University of Sussex), M. Smith (University of the Western Cape), K. Barbary, J. P. Bernstein, R. Biswas, E. Kovacs, S. Kuhlmann, H. Spinka (Argonne National Laboratory), E. Ahn, D. Finley, J. Frieman, J. Marriner, W. Wester (Fermilab)
on 20 Feb 2013; 01:10 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: R. C. Thomas (rcthomas@lbl.gov)

Subjects: Supernovae, Transient

We report optical spectroscopy of a supernova candidate discovered by the Dark Energy Survey (ATel #4668). The spectrum (450-960 nm) of DES12S2b was obtained using Deimos on Keck II. A fit of the spectrum with SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) reveals this event to be a Type Ia SN at z=0.37, near maximum light.

 
Name     |  RA (J2000) |  Dec (J2000) | Discovery | Discovery | Spectrum  | Redshift  | Type  | Phase    | 
                                      | Date (UT) | Mag (r)   | Date (UT) |           |       |          | 
DES12S2b | 02:44:00.31 | -00:15:26.6  | 05 Feb    | 22.7      | 17 Feb    |   0.37    | Ia    | near max |