Electronic Telegram No. 526
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 2006cm IN UGC 11723
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 350-740 nm) of SN
2006cm (cf. CBET 521), obtained on May 29.47 UT by M. Calkins with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a reddened
type-Ia supernova around maximum light.  Cross-correlation with a library of
type-Ia-supernova spectra indicates that 2006cm is most similar to the
1991T-like supernova 1998es (cf. IAUC 7054) at 2 days past maximum.
Adopting a recession velocity of 4899 km/s for the host galaxy (from "The
Updated Zwicky Catalog", http://tdc-www.harvard.edu/uzc/), the maximum
absorption in the (relatively weak) Si II line (rest 635.5 nm) is
blueshifted by roughly 11500 km/s.  Also, interstellar Na I D absorption at
the redshift of the host galaxy is visible in the spectrum with an
equivalent width of 0.2 nm.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 May 29                      (CBET 526)               Daniel W. E. Green