Hard X-ray observation of Cygnus-3

Details Hard X-ray observation of Cygnus-3 Hard X-ray observation of Cygnus-3

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...8015002r&link_type=abstract

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Physics

Balloon-Borne Instruments, Cygnus Constellation, Scintillation Counters, X Ray Sources, Binary Stars, Bremsstrahlung, Gamma Rays, Photon Density, Pulsars, Stellar Models

Scientific paper

During a balloon observation on October 18, 1977, the high energy X-ray spectrum (20 to 90 keV) of Cyg X-3 was measured with high statistical accuracy. It was found to be consistent with a thermal bremsstrahlung spectrum with kT = 17.5 + 3.1 or - 2.6 keV or a power low E to the minus gamma of the differential photon flux spectrum with gamma equal to 3.6 + or - 0.3. The extrapolation of the observed spectrum to 100 MeV yields a gamma ray intensity which is at least three orders of magnitude below the intensity found by SAS-2. This indicates that the overall spectral behavior of Cygnus X-3 is much different from that of the Crab and Vela pulsars.

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