Instantaneous radio spectra of sources from the Zelenchukskaya survey

Details Instantaneous radio spectra of sources from the Zelenchukskaya survey Instantaneous radio spectra of sources from the Zelenchukskaya survey

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pazh....7..209k&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 7, Apr. 1981, p. 209-214.) Soviet Astronomy Letters, vol. 7, Mar.-Apr. 1981, p. 116-118

Astronomy and Astrophysics

Astronomy

2

Radiant Flux Density, Radio Sources (Astronomy), Radio Spectra, Centimeter Waves, Microwave Frequencies

Scientific paper

Instantaneous radio spectra of 73 radio sources from the Zelenchukskaya survey are measured at frequencies of 3.9, 8.7, and 14.4 GHz in the +(0.4) deg declination range. Straight-amplification radiometers with parametric amplifiers are used at the input, and for a 1 sec time constant the noise fluctuations amount to 0.012 deg K for the 3.9 GHz radiometer, and 0.025 deg K for the 8.7 and 14.4 GHz radiometers. All sources identified with quasars have radio spectra which suggest the presence of compact components, whose angular sizes are estimated at 5-30 x 10 to the -5th arc sec, while 85% of the sources suggest the presence of compact components with angular sizes of less than 0.0001 arc sec.

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