Electronic Telegram No. 2485
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


SUPERNOVAE 2010gw, 2010hx, 2010ij
     N. Morrell, Las Campanas Observatory, Carnegie Supernova Project; and I.
Botti, Universidad de Chile, report that they obtained optical spectroscopy
(range 364-920 nm) of 2010gw (cf. CBET 2410), 2010hx (cf. CBET 2460), and
2010ij (cf. CBET 2478) on Oct. 6 UT with the Las Campans 2.5-m du Pont
telescope (+ WFCCD).  Inspection of the data, with the help of the Supernova
Identification tool (SNID, Blondin and Tonry 2006, Ap.J. 666, 1024) shows that
2010gw is a type II-p supernova between 1 and 2 months after the explosion
date; 2010hx is probably a normal type-Ia supernova at 4-6 weeks past maximum
brightness (although, according to SNID, the spectrum is best matched to the
1991T-like supernova 1999aw at 36 days after maximum light); while 2010ij is a
normal type-Ia supernova at roughly two weeks after maximum brightness, very
similar to SN 1981B at 16 days past maximum light.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 October 8                   (CBET 2485)              Daniel W. E. Green