Flux density measurements of bright extragalactic sources at 36.8 GHz

Details Flux density measurements of bright extragalactic sources at 36.8 GHz Flux density measurements of bright extragalactic sources at 36.8 GHz

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...51...47s&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 51, Jan. 1983, p. 47-62.

Astronomy and Astrophysics

Astronomy

19

Astronomical Spectroscopy, Bl Lacertae Objects, Extragalactic Radio Sources, Quasars, Radiant Flux Density, Astronomical Catalogs, Dicke Radiometers, Graphs (Charts), Periodic Variations, Radio Astronomy, Radio Telescopes, Time Dependence

Scientific paper

The radio continuum flux measuring system of the Metsahovi radio telescope operates at 37 GHz with a two-beam Dicke-type radiometer having a bandwidth of 700 MHz and a DSB system noise temperature of 1200 K. The radiation from the source is integrated by first pointing the eastern beam at it, while the western beam is used as a reference. Results are tabulated for about 400 measurements of 23 sources, of which 18 are quasars, with attention to flux variation time scales and variability index calculations for some cases of interest. Large changes are observed in the cases of DA 55, OH 471, OJ 287, BL Lac, and 3C 454.3.

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