------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2662 2010 Jly 25 12.37UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK Backup: gmh@wdcc1.bnsc.rl.ac.uk WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- OPTICAL TRANSIENT 155011 +121642 E. Gorbovskoy et. al., Sternberg Astronomical Institute, Moscow State University reports on The Astronomer's Telegram 2756 that on 2010 June 14 at 21h39mUT they noted a new Optical Transient in R and V bands at about magnitude 18 in the database of the MASTER II robotic telescope. It was absent on 2010 Feb 26 to a limit of magnitude 20. The transient is located at: RA 15h 50m 11.27s DEC +12 16m 42.2s (2000) The result of the photometry is: JD R V Time 2455362.3635 18.14 18.21 2010-Jun-14 20:43:26.04 2455367.3594 17.92 19.11 2010-Jun-19 20:37:32.16 2455379.3364 18.51 19.18 2010-Jul-01 20:04:24.96 2455382.3119 19.03 18.76 2010-Jul-04 19:29:08.17 2455389.3144 19.27 19.68 2010-Jul-11 19:32:44.17 2455390.3117 19.37 18.91 2010-Jul-12 19:28:50.88 2455397.3516 19.50 20.51 2010-Jul-19 20:26:18.25 A light curve is at: http://observ.pereplet.ru/images/OT155011+121642/transients_lc.png Editor: Although this object is faint, it would be worth those with CCD facilities monitoring the area in case it re-brightens. SUPERNOVA 2010dz IN ANONYMOUS GALAXY Discovery by J. Newton and T. Puckett of a possible supernova (CBET 2318): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010dz May 31.26 13 50 44.39 +17 03 58.5 18.1 132 "W, 47 "N Offsets are from UGC 8755 but a report from Dave Balam at the Dominion Astrophysical Observatory, Vancouver Island comments there are several faint galaxies nearer the SN position one of which presumably may be the parent. SUPERNOVA 2010ea IN ANONYMOUS GALAXY Discovery by the MASTER team of a possible supernova (CBET 2320): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010ea May 29.97 12 45 29.52 +53 51 49.2 17.6 0.3"E, 10.8"S The discovery image is posted at: http://observ.pereplet.ru/images/SN01062010/SN01062010_all.jpg. SUPERNOVA 2010eb IN NGC 488 Discovery by Berto Monard of a possible supernova (CBET 2321): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010eb Jun 12.14 01 21 37.78 +05 17 39.9 14.7 134 "W,135 "N SUPERNOVA 2010ec IN NGC 655 Discovery by the CHASE Project of a possible supernova (CBET 2322): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010ec Jun 5.40 01 41 55.93 -13 05 01.6 17.1 11.8"E, 7.4"S Guy M Hurst