2009CBET.2015....1N

Koichi Nishiyama, Kurume, Fukuoka-ken, Japan; and Fujio Kabashima, Miyaki-cho, Saga-ken, Japan, report their discovery of an apparent nova (mag 18.4) on six 40-s unfiltered CCD frames (limiting magnitude 19.3) taken around Nov. 6.523 UT using a 0.40-m f/9.8 reflector; the position of the variable, designated M31N 2009-11b, was measured to be R.A. = 0:42:39.58 ± 0s.01, Decl. = +41:09:03.4 ± 0".2 (equinox 2000.0), which is 53" west and 425" south of the center of the galaxy M31. Additional magnitudes measured for 2009-11b from Nishiyama, from their own frames unless noted "DSS" for Digitized Sky Survey (limiting magnitudes given parenthetically): 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 that the position of 2009-11b is very near that of M31N 1997-11k (position end figures 39s.59, 04".0; cf. website URL http://www.mpe.mpg.de/~m31novae/opt/m31/M31_table.html), suggesting that 2009-11b may be a re-brightening of 1997-11k. K. Hornoch, Ondrejov Observatory, reports that he measured position end figures 39s.60, 02".9 and magnitude R = 18.6 ± 0.1 from a co-added 450-s R-band CCD frame taken during software tests by P. Kubanek, J. Gorrosabel, and M. Jelinek with the 1.23-m telescope at Calar Alto on Oct. 31.132.