Extended soft X-ray emission from the Crab Nebula

Details Extended soft X-ray emission from the Crab Nebula Extended soft X-ray emission from the Crab Nebula

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...211l..23c&link_type=abstract

Astrophysical Journal, vol. 211, Jan. 1, 1977, pt. 2, p. L23-L27. Research supported by the Science Research Council.

Astronomy and Astrophysics

Astronomy

14

Crab Nebula, Radiant Flux Density, Spaceborne Astronomy, X Ray Sources, Algorithms, Grazing Incidence Telescopes, Lunar Occultation, Oso-3, X Ray Spectra, X Ray Telescopes

Scientific paper

The grazing-incidence X-ray telescopes on the Copernicus satellite were used to scan the Crab Nebula with an angular resolution of approximately 2 arcmin. Using a more precise technique for removing the non-X-ray background, the 0.5-1.5-keV data from this scan are processed with the ART algorithm. A significant extension to the northeast of the nebula is found which is also evident in the raw data. A more diffuse emission region is also apparent to the south of the nebula. These features may be associated with the residual soft X-ray flux observed during a lunar occultation of the Crab Nebula. The present data are consistent with the extensions having a spectrum which is softer than that of the main X-ray source in the Crab Nebula.

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