------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1532 2000 Jun 04 21.45UT 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 GMH at AST.STAR.RL.AC.UK WORLD WIDE WEB http://www.demon.co.uk/astronomer ------------------------------------------------------------------- COMPTON GAMMA RAY OBSERVATORY Further to the announcement on E1524 in relation to gamma ray bursters, as recently discussed at Huntsville, we have now received confirmation that the Observatory was brought into a final orbit at 93 miles above the Earth earlier today. Department of Defence Aircraft followed the final decent into the Pacific Ocean and confirmed the Observatory had broken apart before pieces landed at their intended landing site early this morning. For those of us who attended Huntsville (see also the May issue of 'The Astronomer' for a special article), we can understand the sorrow amongst the NASA engineers we met especially as the Observatory was generating numerous alerts of Gamma Ray Bursters. Since its launch in 1991 it had completed over 51,000 orbits of the Earth. We are currently reviewing remaining satellite monitoring and future launches in the quest for amateurs to record GRB afterglows and will keep you informed of progress. V660 HERCULIS (Q2000/267) Gary Poyner, Birmingham draws our attention to observations of this eruptive variable on the Recurrent Objects Programme for which Jochen Pietz, Germany, has detected an outburst: 2000 June 2.000UT, 14.34C; 2.029, 14.40C (unfiltered CCD images). Gary suggests CCD monitoring for possible superhumps. SUPERNOVA 2000cl IN NGC 3318 Robin Chassagne, Ste. Clotilde, Ile de Reunion, reports the discovery of an apparent supernova (mag 14.8) on two unfiltered CCD images (limiting mag 20) taken with a 0.305-m telescope on May 26.666 and 27.729 UT. SN 2000cl is located at: R.A. = 10h37m16s.07, Decl. = -41o37'47".8 (2000), which is 6" east and 7" south of the centre of NGC 3318. Nothing appears at this location on an image obtained by Chassagne on 2000 Feb. 2 (limiting mag 20) or on a U.K. Schmidt (Digital Sky Survey) image taken on 1980 Jan. 24 (limiting mag about 22). A. Maury, Observatoire de la Cote d'Azur, writes: "L. Vanzi, L. Testi, C. Lidman, and I obtained a fully reduced 30-min spectrum of SN 2000cl with the 1.5-m Danish telescope (+ DFOSC) at the European Southern Observatory on May 27 UT. The spectrum shows the typical features of a type-II supernova: broad H-alpha, H-beta, and He I at 587.5 nm (the latter with a clear P-Cyg profile). An image and the spectrum may be viewed at http://sc6.sc.eso.org/~lvanzi/sn3318.html." IAUC 7432 Guy M Hurst