| 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. = -39°49'51".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sometimes superseded by text appearing later in the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.
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