Electronic Telegram No. 903
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 2007av IN NGC 3279
     A. Harutyunyan, I. Agnoletto, S. Benetti, M. Turatto, and E.
Cappellaro, Istituto Nazionale di Astrofisica, Osservatorio Astronomico
di Padova; and V. Lorenzi Telescopio Nazionale Galileo (TNG), report
that a spectrum of SN 2007av (cf. CBET 901), obtained on Mar. 22.86 UT
with the 3.5-m TNG (+ DOLORES; range 330-808 nm, resolution 1.4 nm),
shows it to be a type-II supernova caught a few days after explosion.
The spectrum consists of a blue continuum overimposed by P-Cyg profiles
of H-Balmer and He I 587.5-nm lines.  Adopting a recession velocity of
1394 km/s for the parent galaxy (from Giovanelli et al. 1997, A.J. 114,
122; via NED), the expansion velocities deduced from H-alpha and H-beta
minima are about 11700 and 10800 km/s, respectively.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 March 23                    (CBET 903)               Daniel W. E. Green