2008CBET.1536....1Y

H. Yamaoka, Kyushu University, reports that K. Itagaki (Yamagata, Japan) has discovered the first apparent outburst in real time of a cataclysmic variable on a survey CCD image taken on Oct. 9.793 UT with a 0.21-m reflector. A confirming image taken by Itagaki on Oct. 9.801 with a 0.60-m reflector shows the variable at mag about 14.7, and he measures its position to be R.A. = 8h12m07s.63, Decl. = +13d18'24".9 (equinox 2000.0). Nothing appears at this position on images taken by Itagaki on 2007 Dec. 14.712 (limiting mag about 17.0) and 2008 Sept. 27.783 (limiting mag 16.0). Yamaoka adds that a star of blue mag 19.8-19.9 and red mag 19.2-19.5 in the USNO-B1.0 catalogue has position end figures 07s.64, 24".8; this star seems to be also present in the GSC 2.3 and Sloan Digital Sky Survey catalogues, as also noted by P. Schmeer. Yamaoka notes that this star was discovered by Szkody et al. (2007, A.J. 134, 185), where the authors give it a preliminary designation SDSS J081207.63+131824.4. D. Denisenko, Space Research Institute, Moscow, reports that a previous bright outburst of this variable was found in Palomar NEAT data available at the website http://skyview.gsfc.nasa.gov/skymorph/skymorph.html, yielding the following unfiltered NEAT magnitudes: 2002 Dec. 1.570, 17.2; 1.580, 17.1; 1.591, 17.0; 5.535, 13.8; 5.545, 13.7; 5.556, 13.8; 10.474, 14.6; 10.484, 14.9; 10.497, 14.8. No additional outbursts were found on other NEAT images taken on 1997 Dec. 26; 2000 Mar. 28, Dec. 4; 2001 Feb. 19, Mar. 12, 19, Oct. 2, Nov. 18, 23, Dec. 9, 10, 16, 22; 2002 Jan. 5, 8, 9, 11, 16, Feb. 6, 16, Mar. 28, Nov. 20; 2003 Jan. 22, 27, Feb. 3, Apr. 14, and 2006 Dec. 22. The star is at minimum light on nine Palomar plates (blue and red sky survey plates from 1951 Mar. 27, Quick-V from 1984 Dec. 21, POSS blue on 1986 Feb. 9 and 1991 Dec. 12, red plates on 1989 Nov. 5 and 7, and infrared plates on 1997 Nov. 23 and 1998 Nov. 15).