2010CBET.2494....1M

J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, G. Folatelli, R. Cartier, and F. Forster, Universidad de Chile; G. Pignata and M. Cifuentes, Universidad Andres Bello; P. Gonzalez, Pontificia Universidad Catolica 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 16.6) on an unfiltered image taken on Oct. 9.35 UT with the 0.41-m 'PROMPT 4' telescope located at Cerro Tololo. The new object, which is also present in images taken on Oct. 12.27 (at mag approximately 16.8), is located at R.A. = 6:57:23.79 ± 0".1, Decl. = -24:43:10.5 ± 0".1 (equinox 2000), which is about 11".8 west and 26".1 north of the center of the galaxy ESO 491-12. Nothing is visible at this position on archival images taken on Aug. 27.40 (limiting mag 18.0) and Feb. 11.17 (limiting mag 18.5).