Electronic Telegram No. 3154 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network SUPERNOVA 2012cu IN NGC 4772 M. Ganeshalingam, S. B. Cenko, W. Li, A. V. Filippenko, J. M. Silverman, and K. Clubb, Lick Observatory Supernova Survey, University of California, Berkeley, report a detection of SN 2012cu on an image obtained on June 11.2 UT -- three days prior to the discovery reported on CBET 3146. An optical transient is clearly visible at mag 17.6 at the position of SN 2012cu on an unfiltered KAIT CCD image. A previous image of the field on May 24.3 shows nothing at the supernova's position (limiting mag 17.8). Corrigendum. On the last line of the item by Marion and Milisavljevic on CBET 3146, FOR NGC 4771 READ NGC 4772 NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2012 CBAT 2012 June 27 (CBET 3154) Daniel W. E. Green