Brightness Distribution in Discrete Radio Sources I. Observations with an East-West Interferometer
- Creators
- Moffet, Alan T.
Abstract
The Caltech variable baseline interferometer has been used in a program of brightness distribution measurements on 195 discrete radio sources at a wave length of 31.3 cm. This paper reports measurements, made with an east- west interferometer baseline, of the complex visibility functions of 127 sources. The amplitude and phase of the visibility functions were measured at transit with antenna spacings of 195λ, 389λ, 779λ and 1557λ. Using these same basic spacings, and by observing at large hour angles, the visibility amplitude was measured at ten other effective spacings between 126λ and 1363λ. Not all sources are observed at all spacings. The data are presented in tabular form, and graphs of the visibility amplitude as a function of antenna spacing are given for 51 of the more interesting sources. The interpretation of these data in terms of source brightness distributions will be given in another paper.
Additional Information
The material in this paper forms a portion of a thesis submitted to the Faculty of the California Institute of Technology in partial fulfillment of the requirements for the Ph.D. degree. The author has held a National Science Foundation Predoctoral Fellowship during the cource of this work. The assistance of D. Morris, V. Radhakrishnan, and D. E. Harris in taking the observations is gratefully acknowledged, as are the discussions and criticisms of P. Maltby, T. A. Matthews, R. B. Leighton, G. J. Stanley, and J. G. Bolton. Thanks are due to Matthews and to R. W. Wilson for making available the results of their observations in advance of publication. The program in radio astronomy at the California Institute of Technology is supported by the United States Office of Naval Research under Contract Nonr 220(19).Attached Files
Accepted Version - Brightness_distribution_in_discrete_radio_sources_I._Observations_with_an_east-west_interferometer.pdf
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Additional details
- Alternative title
- Observations of the Owens Valley Radio Observatory
- Eprint ID
- 47099
- Resolver ID
- CaltechAUTHORS:20140709-095442913
- Nonr 220(19)
- Office of Naval Research (ONR)
- National Science Foundation Predoctoral Fellowship
- Created
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2014-07-09Created from EPrint's datestamp field
- Updated
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2022-04-29Created from EPrint's last_modified field
- Caltech groups
- Owens Valley Radio Observatory
- Series Name
- Observations of the Owens Valley Radio Observatory