Classification of SN 2005dm, a SN 1991bg-like Type Ia Supernova
ATel #596; The Nearby Supernova Factory: G. Aldering, S. Bailey, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang, B. A. Weaver (Lawrence Berkeley National Laboratory, Berkeley, CA), P. Antilogus, G. Garavini, S. Gilles, R. Pain (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut de Physique Nucleaire de Lyon), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), R. Kessler (Kavli Institute for Cosmological Physics, Chicago, IL), C. Baltay, D. Rabinowitz, A. Bauer (Yale)
on 28 Aug 2005; 22:56 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: R. C. Thomas (rcthomas@lbl.gov)
Subjects: Optical, Supernovae
The Nearby Supernova Factory reports that a spectrum (range 320-1000 nm) of SN 2005dm (CBET #203), obtained Aug 27.6 UT with the Supernova Integral Field Spectrograph on the University of Hawaii 2.2-meter telescope, shows it to be a peculiar Type Ia supernova around maximum light. The spectrum is similar to that of the underluminous SN 1991bg, exhibiting a classic Ti II trough at 400-450 nm.
