Radio-interferometric imaging of very large objects

Details Radio-interferometric imaging of very large objects Radio-interferometric imaging of very large objects

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202..316c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 316-321.

Astronomy and Astrophysics

Astronomy

78

Imaging Techniques, Interferometry, Radio Interferometers, Radio Sources (Astronomy), Algorithms, Astronomical Maps, High Resolution, Maximum Entropy Method, Very Large Array (Vla)

Scientific paper

Imaging of very large objects with high resolution at radio wavelengths cannot be performed by either a single dish or a radio interferometer alone, but requires the combination of observations made with both types of instruments. The author describes the difficulties with schemes based upon simple linear combinations, and proposes, instead, a scheme based upon joint deconvolution of all data, both interferometer and single dish. The Maximum Entropy method is particularly well-suited to this type of problem and results in a fast, simple algorithm. The author demonstrates the performance of this algorithm on a VLA observation of a very extended object. He also discusses the relation of the proposed method to that of Ekers and Rots for obtaining short-spacing information from a scanned interferometer.

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