Scintillating confusion - Evaluation of a technique for measuring compact structure in weak radio sources

Details Scintillating confusion - Evaluation of a technique for measuring compact structure in weak radio sources Scintillating confusion - Evaluation of a technique for measuring compact structure in weak radio sources

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84.1129s&link_type=abstract

Astronomical Journal, vol. 84, Aug. 1979, p. 1129-1137.

Astronomy and Astrophysics

Astronomy

2

Radio Sources (Astronomy), Scintillation, Signal Detection, Brightness, Cross Correlation, Data Processing, Radio Telescopes

Scientific paper

The utility of studying the scintillation properties of confusion in a large single-dish radio telescope in order to measure compact structure in weak radio sources is investigated on the basis of observations of scintillations of 860-MHz confusion in the NRAO 91-m telescope. The data obtained are analyzed by two independent methods to obtain information on the scintillation-index distribution of weak radio sources. A cross-correlation analysis is performed, and a survey is undertaken for isolated scintillating sources. It is found that: (1) there is a major difficulty with the use of scintillations of confusion to study the compactness distribution of weak radio sources; (2) the scintillation 'confusion amplitude' close to the sun is very small, implying that very deep scintillation searches for highly compact sources are both feasible and likely to yield interesting results; and (3) the compactness distribution of radio sources with 850-MHz flux densities of 0.25 to 0.50 Jy is apparently not significantly different than that of stronger sources.

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