SIMBAD references

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. = 21:38:06.571, Decl. = +26:19:57.33 (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.).