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Using sub-aperture illumination to solve the shortspacing problem

Published online by Cambridge University Press:  12 April 2016

David P. Woody,
Nick Z. Scoville and
Lee G. Mundy
David P. Woody
Affiliation:
Owens Valley Radio Observatory, California Institute of Technology, PO Box 968, Big Pine, Ca 93513
Nick Z. Scoville
Affiliation:
Owens Valley Radio Observatory, California Institute of Technology, PO Box 968, Big Pine, Ca 93513
Lee G. Mundy
Affiliation:
University of Maryland, Astronomy Program, College Park, MD 20742

Abstract

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A common problem in producing interferometer maps of objects with structure on the scale-size of the primary beam is the acquisition of UV data corresponding to telescope spacings of less than one telescope diameter. One technique for solving this “short-spacing” problem is to divide the aperture of one of the telescopes into smaller sub-apertures and measuring the visibilities between these sub-apertures. This technique is being tested using the Owens Valley Millimeter Interferometer.

Information

Type
Hardware for Interferometry
Information
International Astronomical Union Colloquium , Volume 131: Radio Interferometry: Theory, Techniques, and Applications , 1991, pp. 81 - 85
Copyright
Copyright © Astronomical Society of the Pacific 1991

References

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Thompson, A.R., Moran, J.M., and Swenson, G.W. 1986, Interferometry and Synthesis in Radio Astronomy, Wiley, John and Sons, , New York.Google Scholar