[IAUC] CBET 943: 20070424 : SUPERNOVA 2007bz IN IC 3918 [correction to host-galaxy designation, CBET 942]

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                                                  Electronic Telegram No. 943
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
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SUPERNOVA 2007bz IN IC 3918  [correction to host-galaxy designation, CBET 942]
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 350-740 nm) of 2007bz
(cf. CBET 941), obtained on Apr. 24.31 UT by J. Downes with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-Ia
supernova around maximum light.  The supernova spectrum is contaminated by
that of its host galaxy.  Cross-correlation with a library of type-Ia
supernova spectra indicates that 2007bz is most similar to the 1991T-like
supernova 1998es (cf. IAUC 7054) at 1 day past maximum light.  Adopting a
recession velocity of 6529 km/s for the host galaxy (Van Driel et al. 2000,
A.Ap. Suppl. 144, 463), the maximum absorption in the Si II line (rest 635.5
nm) is blueshifted by roughly 11500 km/s.


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                         (C) Copyright 2007 CBAT
2007 April 24                    (CBET 943)               Daniel W. E. Green