Variation of the fraction of obscured (with HR < − 0.4) EROs with respect to X-ray flux. The dashed line is at 63.6%, where the overall fraction of obscured EROs with fx > 10-15 erg s-1 cm-2 is. We do not see any significant dependency of the fraction of obscured EROs with X-ray flux, except for sources with fx < 10-15 erg s-1 cm-2. The vertical error-bars are Poisson estimates, while the horizontal are the bin widths, which were chosen to contain the same number of sources.
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