Astronomy and Astrophysics – Astronomy
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.0515b&link_type=abstract
American Astronomical Society, 198th AAS Meeting, #05.15; Bulletin of the American Astronomical Society, Vol. 33, p.793
Astronomy and Astrophysics
Astronomy
Scientific paper
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.
Beasley Anthony J.
Fomalont Edward B.
Gordon D. G.
Ma Caiwen
Peck Alison
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