------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2109 2005 Apr 30 16.44UT 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.theastronomer.org ------------------------------------------------------------------- NSV 18241 Patrick Schmeer, Bischmisheim, Germany, reports his detection of a rare outburst of NSV 18241 from unfiltered CCD images secured with the University of Iowa, Rigel telescope (0.37-m Cassegrain): 2005 Apr. 22.130, 171CR; 2005 Apr. 26.304, 138CR R magnitudes are based on the USNO-A2.0 catalogue. Patrick adds that only two outbursts were observed prior to the current one: 1973 Nov. 27.465UT, B=13.03; 2004 Mar. 28.839 UT, mv= 12.9 (P. Schmeer - vsnet-alert 8081). The orbital period of NSV 18241 = PG 0935+075 is 0.1868 days (Thorstensen, J.R., Taylor, C.J., MNRAS 326, 1235-1242 (2001)). The position of the object is: RA 09h 38m 36.98s DEC +07 14' 55.4" (2000) Eddy Muyllaert, Belgium has confirmed the outburst on Apr 26.8993UT at magnitude 13.0 (GSC sequence). Gary Poyner, Birmingham, comments: This star has just been added to the Recurrent Object Programme, (see VSSC 123, March 2005) so the outburst is a timely one. Please give this object priority! Only one single night of photometry has been carried out on this star (Vanmunster, 2004) so there is much to do - and learn! Mike Simonsen has a PROVISIONAL chart ready for download at... http://joevp.20m.com/charts/provisional/ SUPERNOVA 2005bk IN MCG +07-33-27 Discovery by R. Jansen et. al, Arizona State University, of a possible supernova (IAUC 8512): SN 2005 UT R.A. (2000.0) Decl. Mag. Offset 2005bk Apr. 2.46 16 02 17.04 +42 54 55.3 17.95R 4.5"E, 5.6"S The discovery instrument was the 1.8-m Vatican Advanced Technology Telescope, Mount Graham. SUPERNOVA 2005bl IN NGC 4059 Discovery by LOSS of a possible supernova (IAUC 8512): SN 2005 UT R.A. (2000.0) Decl. Mag. Offset 2005bl Apr. 14.34 12 04 12.26 +20 24 24.8 18.3 13.2"E,11.4"S M31N 2005-01a Further to the discovery announcement on TA E-Circular 2078 of a nova found in M31 by Ron Arbour and a follow-up report on E-Circular 2079, the object has now received a preliminary designation. The name 'M31N 2005-01a' now appears on the WWW page for such objects at the site of the Central Bureau: http://cfa-www.harvard.edu/iau/CBAT_M31.html Guy M Hurst