Electronic Telegram No. 2273
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
URL http://www.cfa.harvard.edu/iau/cbat.html


POSSIBLE NOVA OR NEW CATACLYSMIC VARIABLE IN PEGASUS
     On May 7.4 UT, Dae-Am Yi, Yeongwol-kun, Gangwon-do, Korea, reported (via
H. Yamaoka, Kyushu University) the detection of an apparent new object
(mag about 10.8) on two images taken on May 6.77 with a Canon 5D digital
camera (+ 93-mm camera lens).  Yi confirmed the object with a 400-mm lens
on May 7.76, when the object had brightened to mag about 8.4.  The
confirmation image suggests that the brightened object is positionally
coincident with the GSC star 2197:886, whose catalogued position in GSC
version 2.3 is R.A. = 21h38m06s.571, Decl. = +26d19'57".33 (equinox 2000.0),
with magnitudes F = 13.88 and j = 14.57.  Yamaoka notes that the Digitized
Sky Survey image of GSC 2197:866 is elongated toward the north-south,
indicating that it is a double/multiple star.  Precise astrometry is
strongly needed of Yi's object.  Yamaoka also notes that there is a bright
x-ray source (1RXS J213807.1+261958) near the position, which suggests that
the brightened object may be a cataclysmic variable star (classical nova,
dwarf nova, etc.).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 May 8                       (CBET 2273)              Daniel W. E. Green