Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-01-24
Astrophys.J.Suppl.141:13-22,2002
Astronomy and Astrophysics
Astrophysics
25 pages, 5 figures. Accepted to ApJS
Scientific paper
10.1086/339806
A catalog containing milliarcsecond--accurate positions of 1332 extragalactic radio sources distributed over the northern sky is presented - the Very Long Baseline Array Calibrator Survey (VCS1). The positions have been derived from astrometric analysis of dual-frequency 2.3 and 8.4 GHz VLBA snapshot observations; in a majority of cases, images of the sources are also available. These radio sources are suitable for use in geodetic and astrometric experiments, and as phase-reference calibrators in high-sensitivity astronomical imaging. The VCS1 is the largest high-resolution radio survey ever undertaken, and triples the number of sources available to the radio astronomy community for VLBI applications. In addition to the astrometric role, this survey can be used in active galactic nuclei, Galactic, gravitational lens and cosmological studies. The VCS1 catalog will soon be available at www.nrao.edu/vlba/VCS1 .
Beasley Anthony J.
Fomalont Edward B.
Gordon Daniel
Ma Caiwen
MacMillan Daniel S.
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