Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..66..211b&link_type=abstract
Astrophysics and Space Science, vol. 66, no. 1, Nov. 1979, p. 211-221.
Astronomy and Astrophysics
Astronomy
11
Crab Nebula, Decametric Waves, Radio Interferometers, Radio Sources (Astronomy), Radio Spectroscopy, Emission Spectra, Radiant Flux Density, Radio Spectra, Visibility
Scientific paper
This paper presents the results of measurements of the Crab nebula in the decameter range with an interferometer whose baseline is 2.4-3.5 x 10 to the 3rd of the wavelength. Visibility function values, which in these observations determine the contribution by the compact source to the total nebula flux, have been measured at frequencies 16.7, 20 and 25 MHz to be 0.64 + or - 0.07, 0.43 + or - 0.04 and 0.31 + or - 0.03, respectively. The spectral index of the spectrum obtained for the compact source in the range 16.7-122 MHz is 2.09 + or - 0.04. Flattening of the nebula spectrum without the compact source has been confirmed for the decameter range.
Bobeiko A. L.
Bovkoon V. P.
Braude Ia. S.
Meg'n A. V.
Sergienko Iu. Iu.
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