Other
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...246..484p&link_type=abstract
Astrophysical Journal, Part 1, vol. 246, June 1, 1981, p. 484-488.
Other
46
Binary Stars, Crab Nebula, Pulsars, Stellar Spectra, X Ray Sources, X Ray Spectra, Broadband, Emission Spectra, Line Spectra, Magnetic Stars, Neutron Stars, Oso-8, Stellar Magnetic Fields, Variable Stars
Scientific paper
The X-ray spectra of the Crab pulsar and Crab Nebula are analyzed. Observations were made with OSO 8 on March 17-18, 1978, with all spacecraft telemetry assigned to one detector during seven dwell mode experiments. A resolution of 1.25 ms was obtained for pulse-height-analyzed counts in 64 channels. Progressive hardening and subsequent softening of the spectrum across the pulse was found. The fraction of the pulsed flux, exhibiting a spectral variability of about 0.14 was concentrated solely in the region between the two peaks. A model is suggested in which the pulsed X-ray emission from the Crab pulsar consists of two components: one is physically related to the double-peaked gamma-ray pulse and possibly to radio and optical pulses, but has no spectral dependence on the pulse phase, while the other exhibits spectral variability with the pulse phase but is confined to the interpeak emission seen with X-ray energies.
Pravdo Steven Howard
Serlemitsos Peter J.
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