2011CBET.2943....1I

Koichi Itagaki, Yamagata, Japan, reports his discovery of an apparent supernova (mag 12.7) on an unfiltered CCD image (limiting mag 19.0) taken on Dec. 9.856 UT with a 0.3-m f/8 reflector. The new object is located at R.A. = 13:08:58.39, Decl. = -15:31:04.1 (equinox 2000.0), which is 16".6 east and 6".1 south of the nucleus of the presumed host galaxy, NGC 4984 (whose position end figures were measured as 57s.24, 30'58".0). The discovery image is posted at website URL http://www.k-itagaki.jp/images/psn4984.jpg. The variable was designated PSN J13085839-1531041 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011iy based on the spectroscopic confirmations reported below. Additional CCD magnitudes for 2011iy (unfiltered unless noted otherwise): 2007 Feb. 25.708, [19.5 (Itagaki); 2011 Dec. 10.541, 12.5 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera + luminance filter at New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 58s.47, 04".6); 10.785, 12.8 (T. Noguchi, Katori, Chiba-ken, Japan; 0.23-m f/6.3 Schmidt-Cassegrain reflector + BITRAN BT-11E camera; limiting mag 15.5; position end figures 58s.38, 31'04".2; communicated via S. Nakano, Sumoto, Japan). Brimacombe's image of 2011iy is posted at the following website URL: http://www.flickr.com/photos/43846774@N02/6492127541/.