Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-23T15:12:31.160Z Has data issue: false hasContentIssue false
  • English
  • Français

Radio source structures in VLBI astrometry

Published online by Cambridge University Press:  03 August 2017

Patrick Charlot ,
Jean-François Lestrade  and
Claude Boucher
Patrick Charlot
Affiliation:
Institut Géographique National, 2 Avenue Pasteur, F-94160, Saint-Mandé, France
Jean-François Lestrade
Affiliation:
Bureau des Longitudes, 77 Avenue Denfert-Rochereau, F-75014, Paris, France
Claude Boucher
Affiliation:
Institut Géographique National, 2 Avenue Pasteur, F-94160, Saint-Mandé, France

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In astrometry, celestial radio sources with extended structures are useful. An algorithm to correct for structure in VLBI delays and delay rates is developed. The radio source NRAO140 is mapped from data with limited u-v coverage by the hybrid method and the Maximum Entropy procedure. The magnitude of the structure corrections in astrometry is discussed in the case of NRAO140.

Type
I. Celestial Reference Systems
Information
Symposium - International Astronomical Union , Volume 128: Earth's Rotation and Reference Frames for Geodesy and Geodynamics , 1988 , pp. 91 - 96
Copyright
Copyright © Reidel 1988 

References

Ables, J. G., 1974, Astron. Astrophys. Suppl., 15: 383–93.Google Scholar
Cohen, et al, 1975, Astrophys. J., 201: 249–255.Google Scholar
Gull, S. F., Daniell, G. J., 1978, Nature, 272: 686–690.Google Scholar
Högbom, J. A., 1974, Astron. Astrophys. Suppl., 15: 417–26.Google Scholar
Marscher, A. P., Broderick, J. J., 1985, Astrophys. J., 290: 735–741.CrossRefGoogle Scholar
Readhead, A. C. S., Wilkinson, P. N., 1978, Astrophys. J., 223: 25–36.Google Scholar
Thomas, J. B., 1980, NASA-JPL Publication 80–84.Google Scholar