Electronic Telegram No. 2222
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 2010at IN MCG +13-09-10
     Uday K. Gurugubelli, D. K. Sahu, G. C. Anupama, and P. Anto, Indian
Institute of Astrophysics, Bangalore, report that a low-resolution spectrum
(range 350-750 nm) of 2010at (cf. CBET 2216), obtained on Mar. 21.88 UT with
the Indian Astronomical Observatory's 2-m Himalayan Chandra Telescope (+
HFOSC), shows it to be a peculiar type-Ia supernova, a few days before
maximum light.  Using the SNID code of Blondin and Tonry (2007, Ap.J. 666,
1024), the spectrum of 2010at is found to best match that of SN 2000cx at
about 2-3 days before maximum light.  After correcting for the recession
velocity of the host galaxy, MCG +13-09-10 (12537 km/s; Emilio et al. 1999,
PASP 111, 438; via NED), the blueshift of the weak Si II 615.0-nm line
corresponds to a velocity of 11000 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      superseded by text appearing later in the printed IAU Circulars.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 March 23                    (CBET 2222)              Daniel W. E. Green