Radio observations of the December 1982 lunar occultation of the Crab Nebula

Astronomy and Astrophysics – Astronomy

Scientific paper

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Crab Nebula, Lunar Occultation, Radio Sources (Astronomy), Brightness Distribution, Center Of Gravity, Pulsars, Ultrahigh Frequencies

Scientific paper

The 1982 December 2 occultation of the Crab Nebula by the moon was observed at nu = 1640, 960, 750, 178, 140 MHz. Strip distributions beyond the central zone indicate a similar angular size at each nu. The center of gravity is determined. In the central part of the Crab, as nu decreses three bright regions emerge along the major axis. At 750 MHz the brightness along that axis 25 arcsec from the center dips sharply within a 10 arcsec interval.

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