2012CBET.3126....1M

Tomoki Morokuma, Institute of Astronomy, University of Tokyo; Nozomu Tominaga, Kensho Mori, Konan University; Masaomi Tanaka and Nobuharu Ukita, National Astronomical Observatory of Japan; Shigeyuki Sako, Noriyuki Matsunaga, Mamoru Doi, Naoto Kobayashi, Takashi Miyata, Nobuyuki Ienaka, Yoshikazu Nakada, Tsutomu Aoki, Takao Soyano, Ken'ichi Tarusawa, and Hiroyuki Mito, Institute of Astronomy, University of Tokyo; Michael W. Richmond, Rochester Institute of Technology; and Ryosuke Itoh, Koji S. Kawabata, Katsutoshi Takaki, Issei Ueno, and Hiroshi Akitaya, Hiroshima University, on behalf of the Kiso Supernova Survey (KISS) project, report the discovery of an apparent supernova (mag 16.8) on a g-band CCD image (limiting mag 20.5) taken on May 13.56 UT with the Kiso Wide-Field Camera (KWFC; field-of-view 2.1 deg x 2.1 deg) on the 1.05-m Kiso Schmidt telescope at Kiso Observatory. The new object is located at R.A. = 9:10:05.45, Decl. = +20d12'45.1" (equinox 2000.0), which is 1.2" east and 0.5" south of the presumed host galaxy (SDSS J091005.37+201245.6; at z = 0.0282, from the SDSS database). Nothing is detected at this position on reference images taken before 2012 Apr. 28 (limiting mag 20.2). The discovery and reference images are available at the following website URL: http://www.ioa.s.u-tokyo.ac.jp/kisohp/KISS/images/iauc_J091005.45+201245.1.jpg. Additional g-band magnitudes for 2012cm: May 14.54, 16.7; 16.46, 16.5.