Electronic Telegram No. 2339 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 SUPERNOVAE 2010en, 2010eo, 2010ep, 2010eq, 2010er, 2010es, AND 2010et Further to CBET 2327, A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Grahamm 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 CRTS discovery of several apparent supernovae in unfiltered Catalina Sky Survey (CSS) images: SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010en May 13.42 15 50 16.02 + 4 43 34.0 19.0 3".8 W, 3".1 S 2010eo May 21.28 13 50 45.79 +19 26 18.2 17.6 0".1 W, 1".2 N 2010ep May 25.37 16 01 08.91 +34 50 41.6 18.1 5".8 W, 5".1 N 2010eq May 31.31 15 34 47.41 + 2 05 49.7 17.6 2".4 W, 1".0 N 2010er June 9.33 15 50 11.14 +12 16 42.5 17.8 6".0 E, 0".3 S 2010es June 16.32 16 33 17.92 +11 45 04.9 18.8 0".9 E, 1".3 S 2010et June 16.40 17 16 54.08 +31 33 50.6 19.1 24".2 E, 70".3 S Follow-up observations were taken with the Palomar 1.5-m telescope using Gunn filters. Further magnitude estimates for 2010en: Apr. 9.43 UT, [20.0 (CSS); May 27.36, r = 19.0 (Palomar); June 9.30, 19.5 (CSS); 16.28, 19.2 (CSS). Further magnitude estimates for 2010eo: May 7.31, [18.4 (CSS); May 30.28, g = 17.7, r = 17.5, i = 17.6 (Palomar); June 23.24, 17.9 (CSS). Further CSS magnitude estimates for 2010ep: May 12.42, [20.0; June 18.34, 19.0. Further magnitude CSS estimates for 2010eq: May 4.45, [19.0; June 9.24, 17.9; 17.25, 18.1. Further magnitude estimates for 2010er: May 16.39, [19.5 (CSS); May 23.25, 19.5: (CSS); June 2.32, 17.9 (CSS); June 15.42, g = 18.4, r = 18.4, i = 18.8 (Palomar); June 17.28, 18.1 (CSS); June 21.25, 18.3 (CSS). Further magnitude estimates for 2010es: June 2.36, [20.2 (CSS); June 9.34, 19.2 (CSS); June 21.20, 18.6 (CSS); June 24.39, g = 18.8, r = 18.9, i = 19.1 (Palomar). Further CSS magnitude estimates for 2010et: May 23.37, [20.2; June 3.37, 19.6; 9.39, 19.0; 21.32, 19.4. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 June 27 (CBET 2339) Daniel W. E. Green