A study of RXTE and BeppoSAX observations of Cyg X-3
  We present an analysis of Cyg X-3 data from RXTE/PCA,HEXTE and ASM, supplemented by a selected spectrum from BeppoSAX. We fit the PCA/HEXTE spectra from 1996-2000 by a model including hybrid Comptonization, reflection and absorption, and classify them into hard, intermediate and soft states. Apart from the very strong absorption in Cyg X-3, the spectra resemble those of GRS 1915+105. The soft and intermediate state spectra require the presence of nonthermal Comptonizing electrons. We then study the radiative processes at soft X-rays with a hard-state spectrum from BeppoSAX modeled including emission from a photoionized plasma. 
A. Szostek, A. A. Zdziarski