2009CBET.1843....1P

G. Pignata, J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, P. Gonzalez, P. Lopez, S. Silva, G. Folatelli, D. Iturra, R. Cartier, F. Forster, S. Marchi, and A. Rojas, Universidad de Chile; B. Conuel, Wesleyan University; and D. Reichart, K. Ivarsen, 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 16.1 ± 0.2) on an unfiltered image taken on June 11.07 UT with the 0.41-m 'PROMPT 4' telescope located at Cerro Tololo. The new object, which was confirmed in an unfiltered image taken on June 11.97 at mag approximately 15.9 ± 0.2, is located at R.A. = 16:56:53.05 ± 0".1, Decl. = -65:57:18.9 ± 0".1 (equinox 2000), which is about 40".5 west and 8".2 south of the center of the galaxy ESO 101-18. Nothing is visible at this position on archival images taken on June 3.17 (limiting mag 18.5) and 7.13 (limiting mag 17.5).