Electronic Telegram No. 2233 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 2010bl IN MCG -03-32-018 J. Newton and T. Puckett report the discovery of an apparent supernova (mag 16.5) on unfiltered CCD images (limiting mag 19.0) taken with a 0.40-m reflector at Portal, AZ, U.S.A., on Apr. 7.25 UT in the course of the Puckett Observatory Supernova Search. The new object, which was confirmed at mag 16.4 on images (limiting mag 19.9) taken by T. Orff on Apr. 8.13 with a 0.60-m reflector at Ellijay, GA, U.S.A., is located at R.A. = 12h40m34s.92, Decl. = -20o33'40".8 (equinox 2000.0), which is 2".0 west and 3".9 north of the center of MCG -03-32-018. Nothing is visible at this position on images taken by Puckett on 2010 Jan. 8 (limiting mag 19.0). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 April 8 (CBET 2233) Michael Rudenko