Fig. 8
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eRASS:5 X-ray as function of the IRT surface fluxes for different ranges of the fractional X-ray flux. The color scales with the number of sources within the bin, the best fits of our data are shown by the black slopes (dashed and solid lines for eRASS1 and eRASS:5 data) and the green dashed lines indicate the upper and lower branch for the data of Martínez-Arnáiz et al. (2011) (cf. Table 3).
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