Electronic Telegram No. 1154 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://www.cfa.harvard.edu/iau/cbat.html SUPERNOVA 2007rw IN UGC 7798 Further to CBET 1149, D. Madison and W. Li report the discovery of an apparent supernova (mag 14.3) on unfiltered KAIT images taken on Nov. 29.56 UT. The new object is located at R.A. = 12h38m03s.64, Decl. = -2o15'40".1 (equinox 2000.0), which is 4".3 east and 8".9 north of the nucleus of UGC 7798. A KAIT image taken on May 9.11 showed nothing at this location (limiting mag 19.1). S. Gonzalez, Las Campanas Observatory, on behalf of the Carnegie Supernova Project (CSP), writes that he confirmed 2007rw at mag around 16 in several images taken with the Swope 1.0-m telescope at Las Campanas on Dec. 2.32. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2007 CBAT 2007 December 4 (CBET 1154) Daniel W. E. Green