[IAUC] CBET 1003: 20070717 : SUPERNOVA 2007fs IN ESO 601-G5

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                                                  Electronic Telegram No. 1003
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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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.


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