Electronic Telegram No. 2010
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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SUPERNOVAE 2009gl AND 2009gq
     J. M. Silverman, S. B. Cenko, I. K. W. Kleiser, and A. V. Filippenko,
University of California, Berkeley, report that inspection of CCD spectra
(range 340-1000 nm), obtained on June 29 UT with the 3-m Shane reflector (+
Kast) at Lick Observatory, shows that 2009gl (CBET 1860) is a type-IIb
supernova; cross-correlation with a library of supernova spectra using the
"SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) indicates that 2009gl is about 10 days past maximum brightness.
SN 2009gq (CBET 1861) is a normal type-Ia supernova that SNID indicates is
about three weeks past maximum; narrow emission features in a spectrum of
the supernova's host galaxy reveal it to have a recession velocity of about
20000 km/s.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 November 11                 (CBET 2010)              Daniel W. E. Green