Electronic Telegram No. 1801 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 2009eo A. J. Drake, S. G. Djorgovski, A. Mahabal, R. Williams, and M. J. Graham, California Institute of Technology; M. Catelan, Pontificia Universidad Catolica de Chile; E. C. Beshore, A. Boattini, and S. M. Larson, Lunar and Planetary Laboratory, University of Arizona; and E. Christensen, Gemini Observatory, report the CRTS (cf. CBET 1792) discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS) images: SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009eo May 13.29 14 58 07.99 + 2 26 03.3 18.1 17".8 E, 15".0 S Further CSS magnitudes for 2009eo: Mar. 21.40 UT, [21.0; Apr. 20.41, 18.4; 28.41, 18.4. The apparent host galaxy has redshift z = 0.044 (Falco et al. 1999, PASP 111, 438). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2009 CBAT 2009 May 14 (CBET 1801) Daniel W. E. Green