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Monitoring of Extragalactic Radio Sources via Geodetic VLBI Observations

Published online by Cambridge University Press:  03 August 2017

Guoqiang Tang  and
Bernt Rönnäng
Guoqiang Tang
Affiliation:
Onsala Space Observatory, Chalmers University of Technology, S-439 00 Onsala, Sweden
Bernt Rönnäng
Affiliation:
Onsala Space Observatory, Chalmers University of Technology, S-439 00 Onsala, Sweden

Extract

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It was pointed out already in the early stage of the development of the Mark-III VLBI that the structure of the quasars could affect VLBI results for geodesy or astrometry (Cotton, 1980; Robertson, 1981). As errors from other sources are gradually reduced, this effect can not be ignored any longer. We should monitor the structure variations of the sources and study their internal kinematics closely. 8GHz maps made from geodetic VLBI observations may give us important information.

Type
Geophysics
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 431 - 432
Copyright
Copyright © Reidel 1988 

References

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Robertson, D.S.: 1981, in Reference Coordinate Systems for Earth Dynamics, eds. Gaposchkin, E.M. and Kolaczek, B. (Reidel, Dordrecht), pp.205–216.CrossRefGoogle Scholar
Tang, G., Rönnäng, B. and Bååth, L.: 1987, Astron. Astrophys. (in press).Google Scholar