Fig. 7
Hardness ratios (see the definition in Appendix A) and photon fluxes of the 24 point-like sources as a function of the blackbody temperature and luminosity at a distance of 10 kpc. The curved lines from the left to right indicate the luminosity from 1032 to 1036 erg s−1. An absorption of NH = 8 × 1022 cm−2 is assumed for all the sources.
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