Electronic Telegram No. 2645 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 SUPERNOVAE 2010lx, 2010ly, 2010lz, AND 2011P-2011S 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 several supernovae in unfiltered Catalina Sky Survey (CSS) and Mt. Lemmon Survey (MLS) images: SN 2010 UT R.A. (2000.0) Decl. Mag. Offset Type 2010lx Nov. 3.36 4 44 44.57 -22 12 19.1 18.7 0".4 E, 1".4 N IIn 2010ly Nov. 13.32 3 05 03.56 -19 40 38.8 17.9 Ia 2010lz Dec. 13.13 1 50 21.32 -21 44 31.9 18.4 Ic SN 2011 UT R.A. (2000.0) Decl. Mag. Offset Type 2011P Jan. 5.10 2 25 44.80 +16 12 56.0 18.6 IIn 2011Q Jan. 5.41 9 19 11.45 +39 42 29.2 19.0 1".0 W, 0".7 N Ia 2011R Jan. 14.37 9 58 30.13 -10 53 15.4 18.8 14".6 E, 2".1 S IIp 2011S Jan. 14.41 9 13 54.05 -17 00 39.3 17.6 0".5 E, 1".5 S IIn Further unfiltered CSS magnitudes for 2010lx: 2009 Nov. 17.33 UT, [20.4; 2010 Nov. 17.29, 18.4; Dec. 1.32, 18.5; Dec. 14.30, 18.5; 2011 Jan. 14.20, 18.7. Further unfiltered CSS magnitudes for 2010ly: 2010 Nov. 3.26, [20.5; Dec. 14.18, 17.9. Further unfiltered CSS magnitudes for 2010lz: 2010 Nov. 13.24, [20.4; Dec. 5.21, 18.7. Further unfiltered CSS magnitudes for 2011R: 2010 Dec. 13.48, [19.7; 2011 Jan. 29.40, 18.9. Further unfiltered CSS magnitudes for 2011S: 2010 Apr. 13.16, 19.3; Dec. 5.46, 17.3. Further unfiltered MLS magnitudes for 2011P: 2010 Sept. 18.40, [21.5; Dec. 14.09, 21.0. Further unfiltered CSS magnitudes for 2011Q: 2010 Nov. 12.44, [20.5; Dec. 10.43, 20.4; 2011 Jan. 28.32, 19.9. Spectroscopic confirmation was taken with the Gemini North and South telescopes (+ GMOS) between 2010 Dec. 15 and 2011 Jan. 25 UT. Spectra were identified using cross-correlation via a library of spectra using the SNIDS program (Blondin and Tonry 2007, Ap.J. 666, 1024). Measured redshifts: 2010lx, 0.10; 2010ly, 0.04; 2010lz, 0.09; 2011P, 0.08; 2011Q, 0.09; 2011R, 0.02; 2011S, 0.06. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2011 CBAT 2011 February 2 (CBET 2645) Daniel W. E. Green