Observation of the lunar occultation of the Crab nebula on September 10, 1974

Details Observation of the lunar occultation of the Crab nebula on September 10, 1974 Observation of the lunar occultation of the Crab nebula on September 10, 1974

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..453a&link_type=abstract

Astronomicheskii Zhurnal, vol. 53, May-June 1976, p. 453-458. In Russian.

Astronomy and Astrophysics

Astronomy

2

Crab Nebula, Lunar Occultation, Radio Astronomy, Brightness, Center Of Gravity, Radiant Flux Density

Scientific paper

Results of observations of a lunar occultation of the Crab nebula at frequencies of 180 and 1646 MHz are given. The brightness distribution, the angular size of the nebula and the coordinates of the center of gravity of radio emission at both frequencies are obtained. A change in brightness distribution and a displacement of the center of gravity are discovered when the results of the present occultation are compared with the results of an occultation in 1964. The causes of these changes and their probable relationship with the activity of the central region of the nebula in the optical range are discussed.

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