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VLBI phase-referencing for observations of weak radio sources

Published online by Cambridge University Press:  12 April 2016

J.-F Lestrade
J.-F Lestrade*
Affiliation:
Observatoire de Meudon, DERAD, F-92195, Meudon, Principal Cedex and Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California, 91011

Abstract

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Phase-referencing is a technique used in VLBI to extend the signal coherence time from a few minutes to a few hours in order to enhance significantly its sensitivity. With this technique, VLBI observations of milliJansky radio sources can be conducted for high-accuracy differential astrometry as well as imaging. We describe the technique in some details and present, as an example, a submilliarcsecond differential astrometric experiment design to identify the star responsible for the weak radio emission in the binary system Algol.

Type
VLBI Imaging
Information
International Astronomical Union Colloquium , Volume 131: Radio Interferometry: Theory, Techniques, and Applications , 1991 , pp. 289 - 297
Copyright
Copyright © Astronomical Society of the Pacific 1991

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