[IAUC] CBET 2010: 20091111 : SUPERNOVAE 2009gl AND 2009gq

[IAUC mailing list]

                                                  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 en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


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      superseded by text appearing later in the printed IAU Circulars.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