Electronic Telegram No. 2320
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 2010ea
     V. Shumkov, P. Balanutsa, and E. Gorbovskoy, on behalf of the MASTER
team, reports the discovery of an apparent supernova (mag 17.6) on
MASTER-Net (http://observ.pereplet.ru) unfiltered images taken with the
45-cm Gamelton reflector in Kislovodsk on May 29.973 UT.  The new object
is located at R.A. = 12h45m29s.52, Decl. = +53d51'49".2 (equinox 2000.0),
which is 0".3 east and 10".8 south of the center of the apparent host galaxy.
Their reference image, taken with a 40-cm Rigter-Slefogt reflector near
Moscow on 2004 Mar. 11 (same wavelength band), shows nothing at this
position to a limiting magnitude of about 18.5.  The discovery image
is posted at http://observ.pereplet.ru/images/SN01062010/SN01062010_all.jpg.
     After posting on the Central Bureau's unconfirmed-objects webpage,
D. D. Balam, Dominion Astrophysical Observatory, National Research Council of
Canada, reports that images (limiting mag about 20.5) taken in twilight with
the 1.82-m Plaskett Telescope on June 8.23 UT show 2010ea at magnitude V =
18.34, with colors B-V = +0.2 and V-R = +0.4 (SDSS DR6 magnitudes were
converted to Kron-Cousins using the conversion formulae of Chonis and Gaskell
2007, A.J. 135, 264), and located 0".2 west and 11".0 south of a galaxy with
Sloan Digital Sky Survey magnitude g = 16.61 and redshift z = 0.03
(designated SDSS J12452954+5352002).  Balam adds that there is also a very
faint (g = 21.4, r = 21.5) galaxy (or possibly a not in a spiral arm of the
brighter galaxy) located near, but not at, the source position (SDSS
J12452956+5351470); this fainter "galaxy" or knot is located 0".2 east and
13".2 south of the brighter galaxy (and 0".4 east and 2".2 south of 2010ea).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 June 11                     (CBET 2320)              Daniel W. E. Green