A 750-MHz map of the Crab

Details A 750-MHz map of the Crab A 750-MHz map of the Crab

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pazh...12..275a&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 12, Apr. 1986, p. 275-280) Soviet Astronomy Letters (ISSN 0360-0327), vol. 12, Mar.-Apr

Astronomy and Astrophysics

Astronomy

2

Astronomical Maps, Brightness Distribution, Crab Nebula, Lunar Occultation, Radio Spectra, Pulsars, Synthetic Apertures

Scientific paper

Using the Bracewell algorithm and a method of standard cleaning a Crab nebula radio map is synthesized with the resolution 20arcsec×35arcsec from strip distributions obtained during lunar occultations in 1982 - 1983. Dimensions of the extended elliptical structure amount to 300arcsec×400arcsec at the 4% level of the peak intensity. The brightness distribution has a maximum at 10arcsec to the south-east from the pulsar and a number of local brightenings. At the distance of ≡20arcsec to the north-west from the center a gap in the intensity distribution is observed in the form of a strip with the width ⪉15arcsec and PA ≈ 12°. The radio emission at the level ⪆0.5 comes from a region inside ≡70arcsec from the center, except the north-west direction in which it extends up to 120arcsec.

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