------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2597 2009 Nov 23 13.16UT 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 ------------------------------------------------------------------- POSSIBLE RECURRENT NOVA IN M31 = M31N 2009-11b Koichi Nishiyama and Fujio Kabashima, Japan, report on CBET 2015 their discovery of an apparent nova of mag 18.4 on 40-s unfiltered CCD frames (limiting magnitude 19.3) of 2009 Nov. 6.52UT using a 0.40-m f/9.8 reflector. The object is located at: RA 00h 42m 39.58s DEC +41 09' 03.4" (2000), 53"W and 425"S of the centre of the galaxy Messier 31. Additional magnitudes measured by Nishiyama from their own frames unless noted "DSS": 1986 Nov 27, [18.7 (DSS, red); 1993 Oct. 21, [17.9 (DSS, infrared); Oct. 28.645, 29.537, and 30.768 UT, [19.0; Nov. 3.539, 19.0 (19.2); 4.470, 18.7 (19.2); 5.532, 18.6 (19.2); 7.572, 18.2 (19.2). Nishiyama notes it is very near the position of M31N 1997-11k (end figures 39.59s, 04.0") suggesting that 2009-11b may be a re-brightening of 1997-11k. M. Henze et. al., Max- Planck-Institut fuer Extraterrestrische Physik and others advise that M31N 2009-11b is visible in twelve 60-s stacked R-band CCD images obtained with the robotic 60-cm telescope of the Livermore Optical Transient Imaging System (Super-LOTIS, located at Steward Observatory, Kitt Peak) at position end figures 39s.61, 03".2, providing the following magnitudes: Nov. 1.18 UT, 18.8; 2.18, 19.0; 3.33, 18.4; 6.25, 18.6; 8.25, 18.6; 9.25, 18.6. They note that the position of 2009-11b coincides with both M31N 1997-11k and M31N 2001-12b, which were already classified as a recurrent nova. However, the current outburst was already detected one month earlier in stacked H-alpha images obtained with the 1.3-m Ritchey Chretien f/7.5 telescope at Skinakas Observatory (Crete, Greece) using a broad (7.5-nm) H-alpha filter, yielding the following R magnitudes for 2009-11b: Sept. 27.10, [19.5; Oct. 2.10, faintly visible; 9.10, 18.7. M31N 2009-11b was also detected with the Swift Ultraviolet/ Optical Telescope UVW2 filter at an earlier phase suggesting that it might be a cataclysmic variable in our Galaxy. However spectroscopic results from M. M. Kasliwal suggests 2009-11b is a recurrent nova in Messier 31. SUPERNOVA 2009iy IN UGC 8520 Discovery by Veli-Pekka Hentunen and Markku Nissinen, Finland of a possible supernova (CBET 1944): SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009iy Sep 15.80 13 30 10.54 +80 30 26.8 17.9 31 "E,18 "N Aarto Oksanen, Finland has posted an image at: http://murtoinen.dyndns.org:8888/ccd/Arto/ugc8520.jpg SUPERNOVA 2009iz IN UGC 2175 Discovery by LOSS of a possible supernova (CBET 1947): SN 2009 UT R.A. (2000.0) Decl. Mag. Offset 2009iz Sep 19.52 02 42 15.41 +42 23 50.1 18.2 12.3"W,14.5"N A spectrum shows it to be of type-Ib or type-Ic. Guy M Hurst