0.5–10 keV ASCA/GIS spectra from the three regions considered in this work, together with the RXTE/PCA spectrum in the 10–25 keV energy range. All spectra have been rebinned to 10σ per bin for sake of clarity. Solid lines represent the best-fit models (see text and Table 1). Residuals and unfolded nonthermal spectra are shown in the middle and lower panels, respectively.