[IAUC] CBET 1364: 20080504 : SUPERNOVA 2008ce IN NGC 4428

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                                                  Electronic Telegram No. 1364
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2008ce IN NGC 4428
     S. Blondin, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf
of the CfA Supernova Group, reports that a spectrum (range 350-740 nm) of
2008ce (cf. CBET 1363), obtained on May 4.14 UT by W. Brown with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-II-
plateau supernova several weeks past explosion.  The supernova spectrum is
contaminated by that of its host galaxy.  Cross-correlation with a library of
supernova spectra using the "Supernova Identification" code (SNID; Blondin
and Tonry 2007, Ap.J. 666, 1024) indicates that 2008ce is similar to several
type-II-plateau supernovae at 3-6 weeks past explosion.  Adopting a recession
velocity of 3006 km/s for the host galaxy of 2008ce (from de Vaucouleurs et
al. 1991, Third Ref. Cat. of Bright Galaxies), the (relatively weak) maximum
absorption in the H_alpha line (rest 656.3 nm) is blueshifted by roughly 8000
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.


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                         (C) Copyright 2008 CBAT
2008 May 4                       (CBET 1364)              Daniel W. E. Green