The Variable X-Ray Spectrum of Cyg XR-1

Details The Variable X-Ray Spectrum of Cyg XR-1 The Variable X-Ray Spectrum of Cyg XR-1

Jun 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970ssrv...10..830d&link_type=abstract

Space Science Reviews, Volume 10, Issue 6, pp.830-868

Computer Science

17

Scientific paper

The variability of the X-ray spectrum of the discrete source Cyg XR-1 (α = 19h 56m δ = +35°.1) is reviewed. The variations observed in the energy region accessible to balloon borne detectors (energies greater than 20 keV) can be explained by assuming them to be caused by the eclipsing properties of a binary system. It is suggested that the system is composed of a source of small angular extent having a spectrum similar to that of a black body at approximately 1.5 × 108 K (kT= 12.5 keV) and a non X-radiating companion which eclipses it at intervals of 2.9850 days. The system would be surrounded by an X-radiating plasma whose photon flux between 1 and 100 keV can be approximated by a power law spectrum whose exponent is — 1.7.

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