2005CBET..130....1Q

R. Quimby, P. Mondol, P. Hoeflich, and J. C. Wheeler, University of Texas; and C. Gerardy, Imperial College, report the discovery of an apparent supernova in unfiltered CCD images taken on Mar. 28.21 (at mag about 17.4) and 31.45 UT (mag about 16.9) using the 0.45-m 'ROTSE-IIIb' telescope at the McDonald Observatory. The new object is located at R.A. = 13h05m46s.97, Decl. = +27o44'08".4 (equinox 2000.0), which 8".0 wst and 5".5 north of the center of NGC 4960. A co-addition of ROTSE-IIIb images taken between 2004 Dec. 15 and 2005 Jan. 14 (limiting mag about 18.6) shows nothing at this position. The new source is not present on ROTSE-IIIb images taken on Mar. 20.23 (limiting mag about 17.4).