Electronic Telegram No. 2284 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Room 209; Dept. of Earth and Planetary Sciences; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbat@iau.org; cbatiau@eps.harvard.edu URL http://www.cfa.harvard.edu/iau/cbat.html SUPERNOVA 2010cs IN MCG +03-38-20 Further to CBET 2218, X. Parisky, S. B. Cenko, W. Li, and A. V. Filippenko, University of California, report the LOSS discovery of an apparent supernova on unfiltered KAIT images: SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010cs May 12.38 14 47 55.78 +19 03 17.7 19.6 1".5 E, 8".3 S Additional KAIT magnitudes for 2010cs in MCG +03-38-20: a co-added image from Jan. 28 to Apr. 30, [20.7; May 14.42 UT, 19.7. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 May 17 (CBET 2284) Daniel W. E. Green