2011CBET.2715....1M

J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster, S. Silva, F. Carrasco, P. Sanchez, C. Hervias, and D. Iturra, Universidad de Chile; G. Pignata and M. Cifuentes, Universidad Andres Bello; C. Farias, Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan University; G. Folatelli, IPMU, University of Tokyo; 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 (which is part of the Millennium Center for Supernova Science collaboration), report the discovery of an apparent supernova (mag approximately 15.8) on an unfiltered image taken on Apr. 19.40 UT with the 0.41-m 'PROMPT 4' telescope located at Cerro Tololo. The new object (which was designated PSN J18553580-5343290 when posted at the Central Bureau's TOCP webpage and is here designated SN 2011ce based on the spectroscopic report below) is located at R.A. = 18:55:35.84 ± 0".2, Decl. = -53:43:29.1 ± 0".2 (equinox 2000.0), which is about 2".2 east and 4".7 south of the center of the galaxy NGC 6708. Additional CCD magnitudes for 2011ce: 2010 Sept. 11.01, [18.5 (PROMPT4 telescope); 2011 Mar. 4.36, [18.5 (PROMPT4 telescope); Mar. 26.35, 16.8 (PROMPT4 telescope); Apr. 20.32, 16.6 (0.5-m CHASE500 telescope); 22.675, 17.2 (Joseph Brimacombe, Coral Towers Observatory, Cairns, Australia; red filter; position end figures 35s.84, 28".9). Brimacombe has posted his image at the following website URL: http://www.flickr.com/photos/43846774@N02/5644002805. The type-Ia supernova 2004do also appeared in NGC 6708 (cf. IAUC 8382).