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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.

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