Lunar occultation observations of the Crab Nebula

Details Lunar occultation observations of the Crab Nebula Lunar occultation observations of the Crab Nebula

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..485m&link_type=abstract

Astrophysical Journal, Part 1, vol. 234, Dec. 1, 1979, p. 485-492.

Astronomy and Astrophysics

Astronomy

9

Crab Nebula, Lunar Occultation, Pulsars, Radio Sources (Astronomy), Brightness, Radio Telescopes, Spectral Resolution

Scientific paper

Three lunar occultations of the Crab Nebula were observed; two at 114 MHz and one at 26.3 MHz, during the 1974 series of events. At the higher frequency, four strip-integrated brightness profiles were Fourier inverted to synthesize a two-dimensional map of the Nebula to an effective resolution of 30 arc sec. At 114 MHz, the Nebula is composed of a broad envelope of emission which contains several smaller sources. The presence of this small-scale structure is probably due to the ionized elements in the filaments. The 26.3 MHz observations indicate the presence of a bright, localized source containing greater than 80% of the flux of the Nebula. The position of this source is confined by the data to a narrow strip centered at the pulsar NP 0532.

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