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Type determination for SN 2005al

ATel #430; 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 28 Feb 2005; 19:54 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Brian C. Lee (BCLee@LBL.gov)

Subjects: Optical, Supernovae

The Nearby Supernova Factory reports that a spectrum (range 340-1000 nm) of SN 2005al (IAUC # 8488 ), obtained Feb 28.54 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2m telescope, shows it to be a type Ia SN, most likely near maximum light. Assuming a host redshift of z =0.0124 from NED, the Si II 635.5 nm minimum is at approximately 11,000 km/s, and the Ca II infrared triplet absorption extends to a high velocity of 22,500 km/s.

Nearby Supernova Factory