Electronic Telegram No. 2580
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2010kh IN UGC 11657
     R. J. Foley, R. Chornock, N. Sanders, and I. Czekala, Harvard-Smithsonian
Center for Astrophysics, on behalf of a larger collaboration, report that a
spectrum (range 320-830 nm), obtained on Dec. 9.06 UT with the Blue Channel
Spectrograph on the 6.5-m MMT telescope, shows that 2010kh (cf. CBET 2562) 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) shows that the best fit for 2010kh is to the spectrum of the type-
IIb supernova 1993J at a phase of 3-7 days after maximum brightness.  The
absorption minimum of H-alpha is blueshifted by 14600 km/s.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 December 10                 (CBET 2580)              Daniel W. E. Green