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High Precision Differential Astrometry in Large Angular Separation Pairs of Radiosources

Published online by Cambridge University Press:  19 July 2016

J.M. Marcaide  and
J.C. Guirado
J.M. Marcaide
Affiliation:
Dpto. de Matemática Aplicada y Astronomía, Universitat de València, Spain
J.C. Guirado
Affiliation:
Institute de Astrofísica de Andalucía, CSIC, Granada, Spain

Abstract

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We show preliminary results of three of the four radiosource pairs with angular separations ranging from 0.01° to 6° where we have determined such a separation with a typical fractional precision of 10−8 using phase delays corrected for structural and ionospheric contributions. In the radiosource 4C39.25 we measure a motion with respect to an external radiosource which is compatible with previously reported internal superluminal motion.

Type
Astrometry
Information
Symposium - International Astronomical Union , Volume 158: Very High Angular Resolution Imaging , 1994 , pp. 445 - 447
Copyright
Copyright © Kluwer 1994 

References

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