[vsnet-alert 8649] SN 2005dm is a peculiar SN Ia (ATEL)

[Taichi Kato]

   SN 2005dm is a peculiar "dim and red" SN Ia.  Rare event.

# Wishing for Yamaoka-san's follow-up.

# Incidentally, I was the person who made a confirmatory observation
# and the first-epoch multicolor photometry of SN 1991bg.

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The Astronomer's Telegram                   http://www.astronomerstelegram.org 
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ATEL #596							     ATEL #596

Title:		Classification of SN 2005dm, a SN 1991bg-like Type Ia Supernova
Author:	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)
Queries:	rcthomas at lbl.gov
Posted:	28 Aug 2005;  22:56  UT
Subjects:	Optical, Novae, 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.  

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