Electronic Telegram No. 2045 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 2009lv Further to CBET 2023, A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology; M. Catelan, Pontificia Universidad Catolica de Chile; E. C. Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of Arizona; and E. Christensen, Gemini Observatory, report the CRTS discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS) images: SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009lv Nov. 19.20 0 16 26.57 +22 26 10.1 17.4 2".4 E, 5".0 S Additional magnitudes for 2009lv: Oct. 21.18 UT, [19.3 (CSS); Nov. 8.25, 18.1 (CSS); Nov. 23.29, 17.5 (S. Howerton, Arkansas City, KS, U.S.A., remotely using the 0.6-m LB-0001 telescope near Rodeo, NM, U.S.A.). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2009 CBAT 2009 November 24 (CBET 2045) Daniel W. E. Green