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Paper: VLBI phase-referencing for observations of weak radio sources
Volume: 19, Radio Interferometry: Theory, Techniques, and Applications, IAU Colloquium 131
Page: 289
Authors: Lestrade, J.-F.
Abstract: 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.
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