Electronic Telegram No. 2269
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 2010cn
     G. Pignata and M. Cifuentes, Universidad Andres Bello; J. Maza, M. Hamuy,
R. Antezana, L. Gonzalez, P. Gonzalez, S. Silva, G. Folatelli, R. Cartier, F.
Forster, and S. Marchi, Universidad de Chile; B. Conuel, Wesleyan University;
and D. Reichart, K. Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander,
and A. LaCluyze, University of North Carolina at Chapel Hill, on behalf of
the CHASE project, report the discovery of an apparent supernova (mag
approximately 17.6 +/- 0.3) on an unfiltered image taken on May 4.05 UT with
the 0.41-m 'PROMPT 5' telescope located at Cerro Tololo.  The new object,
which is also present at mag approximately 17.2 in an image taken on May
4.98, is located at R.A. = 11h04m06s.57 +/- 0".1, Decl. = +4o49'58".7 +/-
0".1 (equinox 2000.0).  Nothing is visible at this position on archival
images taken on Apr. 4.13 (limiting mag 17.5) and (in a stack of five 40-s
images) on Mar. 25.01 (limiting mag 18.7).  The surface brightness of the
presumed host galaxy has no clear galaxy core.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 May 6                       (CBET 2269)              Daniel W. E. Green