| 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. = +2°23'16".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sometimes superseded by text appearing later in the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.
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