Electronic Telegram No. 971
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 2007ck IN MCG +05-43-16
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrogram (range 350-740 nm) of
the possible supernova reported on CBET 970, obtained by P. Berlind on May
23.39 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows
it to be a type-II supernova roughly one month past explosion.  The spectrum
is similar to that of the type-II-plateau supernova 2004et at 28 days past
explosion.  Adopting a recession velocity of 8083 km/s for the host galaxy
of 2007ck (from "The Updated Zwicky Catalog", http://tdc-www.harvard.edu/uzc/),
the maximum absorption in the H_beta line (rest 486.1 nm) is blueshifted by
roughly 8500 km/s.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 May 23                      (CBET 971)               Daniel W. E. Green