Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....58...17w&link_type=abstract
Astronomy and Astrophysics, vol. 58, no. 1-2, June 1977, p. 17-26. Research supported by the Science Research Council.
Astronomy and Astrophysics
Astronomy
17
Circular Polarization, Polarimetry, Polarized Electromagnetic Radiation, Radio Astronomy, Radio Sources (Astronomy), Centimeter Waves, Data Reduction, Depolarization, Error Analysis, Faraday Effect, Radio Telescopes, Tables (Data)
Scientific paper
Measurements at 49 cm (610 MHz) of the linear and circular polarizations of 37 unresolved radio sources are presented. Techniques for analysis of the data in the Fourier plane are developed, eliminating the need for Fourier transformation to the sky plane. With accuracies of polarization measurement generally better than 0.1%, the small amounts of linear polarization at 49 cm are often detectable. Circular polarization is probably detected in seven sources and suspected in one other. Each of these eight sources exhibits one or more of the following properties: very compact components, an unusual radio spectrum (such as centimeter excess, positive curvature, or complex structure), and total flux variability. For two of the sources (1127-145 and 2134+004) the variation of percentage circular polarization with wavelength is discussed.
Weiler Kurt W.
Wilson Andrew S.
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