X-ray properties of XMMPZCAT sources (red, hatched histogram), compared with the total population of 3XMM sources in the XMM-PZCAT footprint (black, solid line) and the population of 3XMM sources in the XMMPZCAT footprint but with no estimated photo-z (blue, solid histogram). Left panel: normalised 0.2–12 keV flux distributions. Right panel: normalised hardness ratio (HR2) distributions.
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