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We present the results of a survey of radio continuum sources near theGalactic plane using the Very Long Baseline Array (VLBA). Our observations aredesigned to identify compact extragalactic sources of milliarcsecond size thatcan be used for parallax measurements in the Bar and Spiral Structure LegacySurvey. We selected point sources from the NVSS and CORNISH catalogs with fluxdensities above 30 mJy and within $1.5\degr$ of known maser targets. Of the1529 sources observed, 199 were detected. For sources detected on 3 or morebaselines, we determined accurate positions and evaluated their quality aspotential calibrators. Most of the 1330 sources that were not detected with theVLBA are probably of extragalactic origin.

The VLBA Calibrator Search for the BeSSeL Survey