Electronic Telegram No. 1025
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 2007gk IN MCG +11-20-27
     E. Y. Hsiao, M. Graham, and D. Balam, Department of Physics and
Astronomy, University of Victoria; and D. A. Howell, University of Toronto,
report that a spectrum (range 364-675 nm, resolution 1.4 nm) of 2007gk (cf.
CBET 1023), obtained on Aug. 7.29 UT with the 1.82-m Plaskett Telescope of
the National Research Council of Canada, shows it to be a type-Ia supernova
before maximum light.  Adopting the host-galaxy redshift of 0.0266 from
Falco et al. (1999, PASP 111, 438), the Si II 635.5-nm expansion velocity
is 16000 km/s.  According to the 'superfit' matching program of Howell et
al. (2005, Ap.J. 634, 1190), the best fit is to the spectrum of SN 2002bo
at 11-14 days before maximum light.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 August 8                    (CBET 1025)              Daniel W. E. Green