Electronic Telegram No. 2388
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 2010gp IN NGC 6240
     J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, P. Gonzalez, S. Silva, G.
Folatelli, R. Cartier, F. Forster, and S. Marchi, Universidad de Chile; G.
Pignata and M. Cifuentes, Universidad Andres Bello; 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 17.5 +/- 0.4) on an unfiltered image taken on July 14.10
UT with the 0.41-m 'PROMPT 1' telescope located at Cerro Tololo.  The new
object, which was confirmed at mag approximately 15.5 on July 22.97, is
located at R.A. = 16h52m57s.39 +/- 0".1, Decl. = +2o23'16".4 +/- 0".1
(equinox 2000), which is about 22" west and 47" south of the center of the
galaxy NGC 6240.  Nothing is visible at this position on archival images
taken on June 7.13 (limiting mag 18.0) or in a stack five 80-s images taken
between Apr. 24.26 and June 5.13 (limiting mag 19.0).  The type-IIn
supernova 2000bg also appeared in this galaxy (cf. IAUCs 7392, 7394).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 July 23                     (CBET 2388)              Daniel W. E. Green