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Type Determination for SN 2005az

ATel #451; The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut de Physique Nucleaire de Lyon), R. Kessler (Kavli Institute for Cosmological Physics, Chicago, IL), P. Antilogus, G. Garavini, S. Gilles, R. Pain (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Baltay, D. Rabinowitz, A. Bauer (Yale)
on 4 Apr 2005; 18:10 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Peter Nugent (penugent@lbl.gov)

Subjects: Optical, Supernovae

The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of SN 2005az (IAUC # 8503 ), obtained April 4.49 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be a Type Ib near peak brightness. Si II 635.5 nm is well developed and slightly stronger than the He I 587.6 nm line. Na I D lines are present due to both the host and our own galaxy suggesting some extinction along the line of sight to the supernova.