We report on the results of a BeppoSAX ( 1.8–200 keV ) observation of the peculiar X–ray binary source Circinus X–1 ( Cir X–1 ) at the orbital phases between 0.61 and 0.63 .
We find that three components are needed to fit the broad band spectrum : a blackbody component , at a temperature of \sim 0.6 keV , a Comptonized component , with a seed-photon temperature of \sim 1.2 keV , electron temperature of \sim 6 keV and optical depth of \sim 1.7 , and a power-law component dominating the spectrum at energies higher than 20 keV .
We interpret the blackbody as the emission from the accretion disk , while the Comptonized component probably comes from a corona surrounding the inner part of the system .
This spectrum is different from that observed at the periastron ( Iaria et al .
2001a ) because of the presence of the blackbody component .
We discuss the implications of this difference and the presence of the power-law component .