Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95...32s&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 95, Jan. 1983, p. 32-34.
Astronomy and Astrophysics
Astronomy
6
Cosmology, Radio Sources (Astronomy), X Ray Astronomy, Heao 2, Radiant Flux Density
Scientific paper
A survey at 10.7 GHz covering 0.00158 sr of sky to a flux density limit of 50 mJy and a completeness level of three-fourths is discussed. The survey samples five 1-deg x 1-deg squares at a grid interval of 2 arcmin in each coordinate; two of the regions are also surveyed by the Einstein Observatory at X-ray wavelengths, a third lies within a Parkes 2.7-GHz selected region, and a fourth covers part of the 5C 12 region. Two sources are detected, only one of which is stronger than 50 mJy. It is noted that the results of a 4.755-GHz survey (Ledden et al., 1980) predicted that four to six sources would be found. The source counts at low flux densities are found to definitely converge below Euclidean expectations. Flat-spectrum radio sources are seen as showing cosmological evolution.
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