Electronic Telegram No. 2344
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 2010ev IN NGC 3244
     G. Pignata, 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 their discovery of an apparent supernova (mag
approximately 14.3 +/- 0.2) on an unfiltered image taken on June 27.05 UT
with the 0.41-m 'PROMPT 1' telescope located at Cerro Tololo.  The new object,
which was confirmed at mag approximately 13.7 in an unfiltered image taken
with the 'PROMPT 3' telescope on June 29.99, is located at R.A. = 10h25m28s.99
+/- 0".1, Decl. = -39o49'51".2 +/- 0".1 (equinox 2000.0), which is about 1".6
east and 12".4 south of center of the galaxy NGC 3244.  Nothing is visible at
this position on archival images taken on May 1.01 (limiting mag 18.5) and
Apr. 28.02 (limiting mag 18.0).
     Prior to the confirming image by CHASE (above), 2010ev was posted on
the Central Bureau's unconfirmed-objects webpage.  Several hours after that
posting, C. Jacques (Belo Horizonte, Brazil) reported the independent
discovery of 2010ev in the course of the Brazilian Supernovae Search (by C.
Colesanti, E. Pimentel, T. Napoleao, and himself), noting mag 15.0 and
position end figures 29s.06, 50".7 (offset 5".4 east, 10".5 south) on their
unfiltered CCD image (limiting magnitude 18.0) taken with a 0.30-m Schmidt-
Cassegrain f/3 reflector at the CEAMIG-REA Observatory on June 28.89 UT,
adding that nothing is visible at this position on a CCD image taken on
2005 Jan. 15.12 (limiting magnitude 18.5) or on a Palomar Sky Survey plate
from 1984 Feb. 3 (limiting red mag 19.5).
     Also, Greg Bock (Windaroo, Queensland, Australia) reports that
Stuart Parker (Oxford, Canterbury, New Zealand) obtained a 25-s unfiltered
CCD image (limiting red mag 18.2) with a 35-cm Celestron C14 f/6.3 reflector
(+ ST10 CCD camera) on June 27.05 UT, showing 2010ev at red mag 14.8 and
position end figures 28s.94, 51".9 (offset 1".9 east, 11".4 south), as
measured by Bock.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 June 30                     (CBET 2344)              Daniel W. E. Green