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EVN as a phase stable interferometer

Published online by Cambridge University Press:  12 April 2016

Lars B. Bååth
Affiliation:
Onsala Space Observatory, S-439 00 Onsala, Sweden
Franco Mantovani
Affiliation:
Istituto di Radioastronomia, via Irnerio, Bologna, Italy

Abstract

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A technique has been developed by which the data from the Mk3 correlator are read directly into the AIPS package. The data are Fourier transformed from delay lags into frequency channels and kept separately for each IF channel. The data are then corrected for multiand single band delays. We have used this technique to solve for fringe solutions on a reference source and then apply the solution to correct the data on the target source. In a recently analysed experiment we managed in this way to phase reference, using the European VLBI Network (EVN) at 18cm, the quasar OQ208 and the radio quasar 1422+202. These sources are separated by more than 9° on the sky.

Type
VLBI Imaging
Copyright
Copyright © Astronomical Society of the Pacific 1991