Study of the Circinus X-1 broadband spectrum at orbital phases close to the apoastron
作者： R. Iaria , T. Di Salvo , N. R. Robba , L. Burderi
DOI: 10.1086/338507
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摘要: We report on the results of a BeppoSAX (1.8-200 keV) observation peculiar X-ray binary source Circinus X-1 (Cir X-1) at orbital phases between 0.61 and 0.63. find that three components are needed to fit broadband spectrum: blackbody component temperature ~0.6 keV; Comptonized with seed-photon ~1.2 keV, electron ~6 optical depth ~1.7; power-law dominating spectrum energies higher than 20 keV. interpret as emission from accretion disk, while probably comes corona surrounding inner part system. This is different observed periastron (in our previous work) because presence component. discuss implications this difference
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