High-energy gamma-ray and hard X-ray observations of CYG X-3

Details High-energy gamma-ray and hard X-ray observations of CYG X-3 High-energy gamma-ray and hard X-ray observations of CYG X-3

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...175..141h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 175, no. 1-2, March 1987, p. 141-150.

Astronomy and Astrophysics

Astronomy

45

Gamma Ray Astronomy, Stellar Spectra, X Ray Astronomy, X Ray Binaries, Absorption Spectra, Cos-B Satellite, Spectrum Analysis, X Ray Spectra

Scientific paper

High-energy (70 MeV < E < 5 GeV) gamma-ray observations of Cyg X-3 by the ESA satellite COS-B and hard X-ray (14 keV < E < 140 keV) observations by the Leiden-MIT balloon experiment, Leimit, are presented. A comparison with, and a study of earlier results over the 14 decades in energy from 1 keV up to ≡1017eV indicates that the strong variability of Cyg X-3 over more than one order of magnitude at energies below 20 keV does not exhibit itself in the data collected at hard X-ray energies, and the power emitted per decade of energy reaches a minimum in the MeV-GeV region. If the primary gamma-rays up to 1015eV originate close to the central source, absorption by the keV X-rays in the Cyg X-3 binary system could explain the latter phenomenon.

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