Electronic Telegram No. 3983 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 2011kj = PSN J05112123-2553059 A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology; J. L. Prieto, Carnegie Observatories; R. H. McNaught and G. Garradd, Australian National University; 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 discovery of an apparent supernova in unfiltered Catalina Sky Survey and Siding Spring Survey (SSS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011kj Jan. 23.55 5 11 21.23 -25 53 05.9 16.7 1" E, 7" S The variable was designated PSN J05112123-2553059 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011kj based on the spectroscopic confirmation of this as a type-Ia supernova on 2011 Jan. 25 or 26 by J. Prieto (cf. URL http://www.astronomerstelegram.org/?read=3126). Further SSS magnitudes for 2011kj: 2010 Sept. 7.80 UT, [18.7; 2011 Jan. 6.58, 16.8. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2014 CBAT 2014 September 20 (CBET 3983) Daniel W. E. Green