Electronic Telegram No. 2650 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 2011V IN MCG +05-22-48 A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology; J. L. Prieto, Carnegie Observatories; 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 Catalina Real-time Transient Survey's discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011V Jan. 28.29 9 27 38.76 +28 47 27.2 16.0 35" E, 27" S Further unfiltered magnitudes for 2011V: Jan. 10.39 UT, [19.5 (CSS); 29.157, 16.6 (R. A. Koff, Bennett, CO, U.S.A.; position end figures 38s.78, 27".0; from five co-added images). This object was designated PSN J09273876+2847275 on the Central Bureau's TOCP webpage due to a slightly different position provided there by the discoverers. D. Milisavljevic, J. Parrent, and R. Fesen, Dartmouth College, report on low-dispersion spectra (range 430-780 nm) taken on Feb. 2 and 3 UT with the 2.4-m Hiltner telescope (+ CCDS) at MDM Observatory. A spectrum of PSN J09273876+2847275 = SN 2011V indicates that it is likely a type-IIb supernova approximately one week after maximum light. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2011 CBAT 2011 February 5 (CBET 2650) Daniel W. E. Green