Electronic Telegram No. 2336
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2010dc IN IC 4854
     S. Valenti and A. Pastorello, Queen's University, Belfast; M. Turatto,
Istituto Nazionale di Astrofisica (INAF), Osservatorio di Catania; and S.
Benetti and F. Bufano, INAF, Osservatorio di Padova, on behalf of a larger
collaboration, report that a low-signal-to-noise spectrogram of 2010dc (cf.
CBET 2291), obtained on June 19.4 UT with the European Southern Observatory's
New Technology Telescope (+ EFOSC2; range 350-730 nm; resolution 1.9 nm)
under poor sky conditions, is that of a type-Ib/c supernova, 2-3 weeks after
maximum.  Comparison of the observed spectrum with a library of supernova
spectra via the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383;
available at website URL https://gelato.tng.iac.es/login.cgi) shows strong
resemblance to that of SN 2007gr (Valenti et al. 2008, Ap.J. 673, 155) at 17
days after B-band maximum.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 June 21                     (CBET 2336)              Daniel W. E. Green