------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1666 2001 Aug 16 17.50UT 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 ------------------------------------------------------------------- SUPERNOVA 2001dm IN NGC 749 B. A. Beutler, M. Modjaz and W. D. Li, University of California at Berkeley, report the discovery by LOTOSS of an apparent supernova (mag about 15.4) in unfiltered images taken with the Katzman Automatic Imaging Telescope on Aug. 7.5 and 8.5 UT. The new object is at R.A. = 1h55m40s.55, Decl. = -29d55'20".7 (2000), which is 6".9 west and 0".4 north of the nucleus of NGC 749. IAUC 7679 COMET C/2001 A2 (LINEAR) Mark Kidger, Planetary Editor of The Astronomer reports: "Monitoring of the inner coma by the Spanish Comet Observers Team reveals two small photometric events that are possibly related to the ejection of small fragments from the nucleus. Representative CCD R magnitudes, using a 10" aperture and the USNO A2.0 catalogue for reference stars: July 23.996 UT, 12.62 (R. Ferrando, Pla D'Arguines, 0.26-m Schmidt-Cassegrain); 24.889, 12.80 (P. Manteca, Begues, 0.26-m Schmidt-Cassegrain); 25.936, 12.4 (D. Rodriguez, Madrid, 0.20-m Schmidt-Cassegrain); 29.853, 12.79 (Manteca); 30.933, 12.92 (Manteca); 31.881, 12.85 (Manteca); Aug. 2.896, 12.95 (Manteca); 3.844, 13.1 (Manteca); 7.84, 13.4 (R. Ligustri, Latisana, Italy, 0.2-m reflector); 7.852, 13.4 (Ferrando). The lightcurve indicates events of amplitude 0.4 and 0.2 mag initiating at approximately July 25.0 and 30.0 respectively. For comparison, the major event around July 12 had an amplitude of 1.5 mag (10" aperture). This indicates that, if due to fragmentation, these later events were probably caused by the separation of small, short-lived splinters that may not have been directly observable." Guy M Hurst