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Dual-Frequency Synthesis VLBI Observations of 3C84 at 18 cm wavelength

Published online by Cambridge University Press:  12 April 2016

J. A. Biretta ,
N. Bartel  and
J. Deng
J. A. Biretta
Affiliation:
National Radio Astronomy Observatory, P.O. Box O, Socorro, NM 87801
N. Bartel
Affiliation:
Center for Astrophysics, MS42, 60 Garden Street, Cambridge, MA 02138
J. Deng
Affiliation:
University of Iowa, Physics and Astronomy Dept., Iowa City, IA 52242

Abstract

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We present results of a multi-frequency synthesis VLBI experiment which employed observations at 1622 and 1707 MHz. Combining data from two frequencies gave a factor ∼2 improvement in dynamic range over the single frequency images. We estimate map fidelity by comparing the images made separately from each frequency; while the dynamic range is ∼1800, the fidelity index is only ∼5.

Type
VLBI Imaging
Information
International Astronomical Union Colloquium , Volume 131: Radio Interferometry: Theory, Techniques, and Applications , 1991 , pp. 334 - 337
Copyright
Copyright © Astronomical Society of the Pacific 1991

References

Bartel, N. et al. 1988, Nature 334 131 CrossRefGoogle Scholar
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Wilkinson, P., Conway, J., and Biretta, J. 1988, In The Impact of VLBI on Astrophysics and Geophysics, eds. Reid, M.J. and Moran, J.M., IAU Symposium 129, p. 509.CrossRefGoogle Scholar