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Position Solution of Compact Radio Sources Using Long Coherence VLBI

Published online by Cambridge University Press:  14 August 2015

J. S. Gubbay ,
A. J. Legg  and
D. S. Robertson
J. S. Gubbay
Affiliation:
Australian Defence Scientific Service, Dept. of Supply, Weapons Research Establishment, Salisbury, South Australia
A. J. Legg
Affiliation:
Australian Defence Scientific Service, Dept. of Supply, Weapons Research Establishment, Salisbury, South Australia
D. S. Robertson
Affiliation:
Australian Defence Scientific Service, Dept. of Supply, Weapons Research Establishment, Salisbury, South Australia

Abstract

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Compact components of several radio sources were observed in the course of VLBI observations at S-band between NASA-JPL Deep Space Stations located in Australia, South Africa and California, U.S.A., during the southern summer of 1971–72. These stations were equipped with H-maser frequency standards over this period so that the fringe frequency could be determined to better than 1 mHz.

The internal consistency of the position solution could be assessed for sources observed at least three times. This varied with source declination from ± 0″.1 at a declination of 45° to ± 2″.0 near the equator.

The spread in the position solution for P0727-11, a rapid variable at the observing frequency, was also large.

Positions obtained for some other sources have been used to assist in the identification of associated optical objects.

Type
Session C: Radio Astrometry
Information
Symposium - International Astronomical Union , Volume 61: New Problems in Astrometry , 1974 , pp. 125 - 129
Copyright
Copyright © Reidel 1974 

References

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