Electronic Telegram No. 1703
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 2009K AND 2009Z
     M. Stritzinger and N. Morrell, Las Campanas Observatory (LCO), on
behalf of the Carnegie Supernova Project, report that a spectrogram (range
380-940 nm) of supernova 2009K (cf. CBET 1665), taken on Jan. 22 UT with the
6.5-m Magellan II (Clay) telecope (+ LDSS3), reveals that this object is a
type-IIb supernova.  Comparison with a library of spectra via the "Supernova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows
this event to be most similar to supernova 1993J a few days prior to maximum.
This is confirmed with a spectrogram taken on Feb. 8, which is most similar
to 1993J at two weeks past maximum.
     Stritzinger, Morrell, and M. Phillips (also LCO) add that they have
obtained spectra (range 403-1011.2 nm) of 2009Z (cf. CBET 1685) on Feb. 11.1
and 15.1 with the 6.5-m Magellan I (BAADE) telecope (+ IMACS).  Cross-
correlation with SNID shows these spectra to be most similar to those of SN
1993J at two days before and three days after maximum, respectively.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 February 23                 (CBET 1703)              Daniel W. E. Green