2011CBET.2727....1M

J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster, S. Silva, F. Carrasco, P. Sanchez, C. Hervias, D. Iturra, and R. Ramirez, Universidad de Chile;G. Pignata, 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 May 15.98 UT with the 0.41-m 'PROMPT 3' telescope located at Cerro Tololo. The new object, was was designated PSN J10160965-1547351 when posted at the Central Bureau's TOCP webpage and is here designated SN 2011dd based on the spectroscopic report below, is located at R.A. = 10:16:09.65 ± 0".2, Decl. = -15:47:35.1 ± 0".2 (equinox 2000.0), which is about 6".9 east and 6".6 south of center of the galaxy NGC 3178. Additional magnitudes for 2011dd: Apr. 30.01, [18.0 (CHASE); May 7.99, [18.0 (CHASE); 17.96, 14.7 (CHASE); 21.186, 16.0 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera at New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 09s.64, 36".0). Brimacombe's image is posted at the following website URL: http://www.flickr.com/photos/43846774@N02/5742847522/.