Abstract
Residual delay errors in VLBI data limit the image sensitivity and dynamic range attainable using current calibration techniques such as self-calibration. Applying phase corrections derived from regular observations of nearby calibrators (phase-referencing), the residual delay errors on a target source can be reduced, increasing coherent integration times. In this paper we present the results of a series of observations made with the VLBA to examine the effectiveness of phase-referencing for improving instrumental phase stability. Optimum observing strategies when studying weak (~mJy) sources are discussed.
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© 1994 Springer Science+Business Media Dordrecht
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Beasley, A.J., Conway, J.E., Diamond, P.J., Cotton, W.D., Vermeulen, R.C. (1994). VLBA Phase-Referencing. In: Robertson, J.G., Tango, W.J. (eds) Very High Angular Resolution Imaging. International Astronomical Union / Union Astronomique Internationale, vol 158. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0880-5_13
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DOI: https://doi.org/10.1007/978-94-011-0880-5_13
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-2633-5
Online ISBN: 978-94-011-0880-5
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