AAS 198th Meeting, June 2001
Session 5. Ground Based Instruments and Surveys
Display, Monday, June 4, 2001, 9:20am-6:30pm, Exhibit Hall

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[5.15] The VLBA Calibrator Survey

A.J. Beasley (Caltech Owens Valley Radio Observatory), D.G. Gordon (Raytheon ITSS & NASA/GSFC), E.B. Fomalont (National Radio Astronomy Observatory), A. Peck (Max-Planck-Institut fur Radioastronomie), C. Ma (NASA/GSFC), L. Petrov (NVI Inc. & NASA/GSFC)

The VLBA Calibrator Survey is a 2.3 & 8.4 GHz VLBI survey of a complete sample of 2200 flat-spectrum sources north of -30 degrees declination, designed to provide scientifically useful images and phase-reference calibrator information to the astronomical community. Images and sub-milliarcsecond positions for the sources are now available online via a graphical search engine. Imaging the sources with the Caltech DIFMAP program has produced a typical rms noise of 3 mJy, with 100:1 dynamic range. The astrometry was performed using AIPS and the GSFC CALC/SOLVE package, generating new source positions in the International Celestial Reference Frame (ICRF) after correcting for various geometric and ionospheric errors. Formal errors are less than 1 mas for 70% of the survey (2 mas for 85%). A summary of the survey results is presented.

The author(s) of this abstract have provided an email address for comments about the abstract: tbeasley@ovro.caltech.edu

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