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A comparison of an interferometer and total-power survey of discrete sources of radio-frequency radiation

Published online by Cambridge University Press:  14 August 2015

C. Hazard  and
D. Walsh
C. Hazard
Affiliation:
Jodrell Bank Experimental Station, University of Manchester, England
D. Walsh
Affiliation:
Jodrell Bank Experimental Station, University of Manchester, England

Extract

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A fundamental limitation to the number of radio sources observable with a given aerial system is set by the finite solid angle of the aerial beam's reception. In any survey, whether it be a total-power survey or an interferometer survey, errors tend to occur whenever two sources are present simultaneously in the aerial beam. If the receiving system is a total-power system the contributions from the two sources will add, and either they will be interpreted as a single source of greater intensity than each of the individual sources, or the sources may be resolved but their intensities and positions may be subject to considerable errors.

Information

Type
Part V Discrete Sources and the Universe
Information
Symposium - International Astronomical Union , Volume 9: Paris Symposium on Radio Astronomy , 1959 , pp. 477 - 486
Copyright
Copyright © Stanford University Press 1959 

References

1. Hanbury Brown, R., and Hazard, C. M.N.R.A.S. 111, 357, 1951.Google Scholar
2. Hanbury Brown, R., and Hazard, C. M.N.R.A.S. 113, 123, 1953.Google Scholar