[IAUC] CBET 1644: 20090103 : POSSIBLE NEW CATACLYSMIC VARIABLE IN URSA MAJOR

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                                                  Electronic Telegram No. 1644
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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POSSIBLE NEW CATACLYSMIC VARIABLE IN URSA MAJOR
     H. Yamaoka, Kyushu University, reports the discovery by K. Itagaki
(Yamagata, Japan) of a previously unknown variable star on a wide-field
survey CCD image taken on Jan. 2.727 UT with a 0.21-m f/3 reflector.
Confirming CCD images taken on Jan. 2.749 with a 0.30-m f/7.8 reflector
show the variable's magnitude to be about 14.9 and its position to be R.A.
= 10h26m37s.04, Decl. = +47d54'26".3 (equinox 2000.0).  The star was fainter
than mag 16.5 on his survey image taken on 2008 Jan. 31.627.  A faint blue
star in the Sloan Digital Sky Survey (magnitudes u = 20.2, g = 20.1, r
= 20.1, i = 20.2, z = 19.9), has a catalogued position that is identical
with the reported object.  The outburst amplitude and the color at its
quiesient phase suggest that the variable is possibly a dwarf nova caught
in outburst.


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                         (C) Copyright 2009 CBAT
2009 January 3                   (CBET 1644)              Daniel W. E. Green