Electronic Telegram No. 916
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://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVA 2007bb IN UGC 3627
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 350-740 nm) of 2007bb
(cf. CBET 912), obtained on Apr. 8.17 UT by M. Calkins with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-IIn
supernova, roughly one week past explosion.  The spectrum consists of a blue
continuum and emission lines of the Balmer series, with a narrow component
of about 400 km/s (FWHM for H_alpha) superposed on a weaker and broader
component of about 2000 km/s (FWHM for H_alpha).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 April 9                     (CBET 916)               Daniel W. E. Green