Electronic Telegram No. 189
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)
URL http://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVA 2005dc IN NGC 7107
     D. C. Leonard and A. Gal-Yam, California Institute of
Technology, report that a preliminarily reduced CCD spectrum
(range 580-900 nm) of SN 2005dc (IAUC 8575), obtained on July 28
UT with the Keck I 10-m telescope (+ LRISp), shows it to be
a type-Ia supernova, probably within a week of maximum light.  The
supernova expansion velocity, derived from the minimum of Si II
(rest 635.5 nm), and adopting the NED recession velocity of 2204
km/s for the host galaxy (from Koribalski et al. 2004, A.J. 128, 16)
is about 12500 km/s.


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      superseded by text appearing later in the formal IAU Circulars.

                         (C) Copyright 2005 CBAT
2005 July 29                     (CBET 189)               Daniel W. E. Green