Electronic Telegram No. 104 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://cfa-www.harvard.edu/iau/cbat.html SUPERNOVA 2004gy Further to IAUC 8454, R. Quimby, C. Gerardy, P. Hoeflich, and J. C. Wheeler report the discovery of an apparent supernova in unfiltered CCD images taken on 2004 Dec. 28.45 (at mag about 17.0) and 31.38 UT (mag about 17.1). SN 2004gy is located at R.A. = 13h30m58s.42, Decl. = +26o14'03".7 (equinox 2000.0), which is 5".4 west of the apparent host galaxy. ROTSE-IIIb images taken on Dec. 20.46 (limiting mag about 18.0) showed nothing at this position. NOTE: These 'Central Bureau Electronic Telegrams' are intended to be preliminary announcements of items that later appear in the formal IAU Circulars. Citations should normally be made to IAUCs rather than to CBETs. (C) Copyright 2005 CBAT 2005 January 8 (CBET 104) Daniel W. E. Green