Electronic Telegram No. 1536
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


OUTBURST OF CATACLYSMIC VARIABLE IN CANCER
     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).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2008 CBAT
2008 October 11                  (CBET 1536)              Daniel W. E. Green