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Type Determination for SN 2005bt

ATel #471; The Nearby Supernova Factory: P. Antilogus, G. Garavini, S. Gilles, R. Pain (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), 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), C. Baltay, D. Rabinowitz, A. Bauer (Yale)
on 26 Apr 2005; 06:13 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 2005bt (IAUC # 8518 ), obtained April 24.5 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2-m telescope, shows it to be a Type II with well developed hydrogen features as well as He I 587.6 nm. Assuming the NED velocity for the host, H-alpha has an expansion velocity of 6800 km/s.