Electronic Telegram No. 2129
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 2009nk IN NGC 5491
     I. K. W. Kleiser, J. M. Silverman, S. B. Cenko, and A. V. Filippenko,
University of California, Berkeley, report that inspection of a CCD spectrum
(range 350-1020 nm), obtained on Jan. 16 UT with the 3-m Shane reflector (+
Kast) at Lick Observatory, shows that 2009nk (CBET 2102) is a type-Ia
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 2009nk is about one week past maximum brightness.  After
removal of the host-galaxy recession velocity of about 6000 km/s, determined
from narrow emission features, the absorption minimum of the Si II 635.5-nm
line is found to be blueshifted by about 10400 km/s.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2010 CBAT
2010 January 17                  (CBET 2129)              Daniel W. E. Green