2010CBET.2320....1S

V. Shumkov, P. Balanutsa, and E. Gorbovskoy, on behalf of the MASTER team, reports the discovery of an apparent supernova (mag 17.6) on MASTER-Net (http://observ.pereplet.ru) unfiltered images taken with the 45-cm Gamelton reflector in Kislovodsk on May 29.973 UT. The new object is located at R.A. = 12:45:29.52, Decl. = +53:51:49.2 (equinox 2000.0), which is 0".3 east and 10".8 south of the center of the apparent host galaxy. Their reference image, taken with a 40-cm Rigter-Slefogt reflector near Moscow on 2004 Mar. 11 (same wavelength band), shows nothing at this position to a limiting magnitude of about 18.5. The discovery image is posted at http://observ.pereplet.ru/images/SN01062010/SN01062010_all.jpg.