Electronic Telegram No. 1003
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://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2007fs IN ESO 601-G5
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrogram (range 350-740 nm) of
2007fs (cf. CBET 1002), obtained by J. C. Hill on July 17.45 UT 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 supernova spectra indicates that 2007fs is most similar to the
type-Ia supernova 1995D at 4 days past maximum.  Adopting a recession
velocity of 5189 km/s for the host galaxy (from Da Costa et al. 1998, A.J.
116, 1), the maximum absorption in the Si II line (rest 635.5 nm) is
blueshifted by roughly 11000 km/s.  The Galactic extinction toward ESO
601-G5, based on maps by Schlegel et al. (1998, Ap.J. 500, 525), is A_B =
0.144 mag.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 July 17                     (CBET 1003)              Daniel W. E. Green