Electronic Telegram No. 1770
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT@CFA.HARVARD.EDU (science)
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SUPERNOVA 2009da
     J. Anderson and N. Morrell, on behalf of the Millenium Center for
Supernova Studies and the Carnegie Supernova Project collaboration,
report that they obtained a spectrum (range 390-940 nm) of 2009da (cf. CBET
1758) on Apr. 17.4 UT with the Magellan II Clay 6.5-m telescope (+ LDSS3) at
Las Campanas Observatory, which shows it to be a type-Ia supernova.
Comparison with a library of supernova spectra via the "Supernova
Identification" tool (Blondin and Tonry 2007, Ap.J. 666, 1024) provides very
good matches with normal type-Ia events at 12-15 days past maximum light.
Adopting for the host galaxy (2MASX J21420805-0646297) the NED recession
velocity of 15678 km/s (Slinglend et al. 1998, Ap.J. Suppl. 115, 1), the
minimum of the 635.5-nm Si II absorption line is blueshifted by 10400 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      superseded by text appearing later in the printed IAU Circulars.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 April 17                    (CBET 1770)              Daniel W. E. Green