10.8-GHz flux density variations among a complete sample of sources from the NRAO-Bonn 84 survey

Details 10.8-GHz flux density variations among a complete sample of sources from the NRAO-Bonn 84 survey 10.8-GHz flux density variations among a complete sample of sources from the NRAO-Bonn 84 survey

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..842s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, Nov. 1983, p. 842-872.

Astronomy and Astrophysics

Astronomy

70

Radiant Flux Density, Radio Sources (Astronomy), Stellar Radiation, Astronomical Catalogs, Quasars, Secular Variations, Tables (Data)

Scientific paper

The authors have measured the 10.8-GHz flux densities of 285 radio sources at 14 epochs between January 1979 and November 1982. For the subset of 258 objects constituting a complex flux-density-limited sample selected at 5 GHz, it is found that at least 45% vary within ten years. About nine-tenths of the steep spectrum (α ≤ -0.5) sources do not vary, whereas about two-thirds of the flat spectrum sources do. Quasars are much more likely to vary than either galaxies or empty field sources. Most objects from the S4 catalog identified with empty fields are galaxies beyond the plate limit.

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