Electronic Telegram No. 204
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
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SUPERNOVA 2005dm IN IC 219
     The "Nearby Supernova Factory" group (G. Aldering, S. Bailey, B. C.
Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L.
Wang, and B. A. Weaver, Lawrence Berkeley National Laboratory; P.
Antilogus, G. Garavini, S. Gilles, and R. Pain, Laboratoire de Physique
Nucleaire et de Haute Energies de Paris; N. Blanc, S. Bongard, Y. Copin,
E. Gangler, L. Sauge, and G. Smadja, Institut de Physique Nucleaire de
Lyon; C. Bonnaud and E. Pecontal, Centre de Recherche Astronomique de
Lyon; R. Kessler, Kavli Institute for Cosmological Physics, Chicago; and
C. Baltay, D. Rabinowitz, and A. Bauer, Yale University) reports that a
spectrum (range 320-1000 nm) of SN 2005dm (cf. CBET 203, IAUC 8589),
obtained Aug. 27.6 UT with the Supernova Integral Field Spectrograph on
the University of Hawaii 2.2-m telescope, shows it to be a peculiar
type-Ia supernova around maximum light.  The spectrum is similar to that
of the underluminous supernova 1991bg, exhibiting a classic Ti II trough
at 400-450 nm.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the formal IAU Circulars.

                         (C) Copyright 2005 CBAT
2005 August 29                   (CBET 204)               Daniel W. E. Green