Fig. 1
Distribution of NH (in units of 1022 cm-2) in the XMM-COSMOS survey. Only extragalactic sources with >30 pn net counts are shown. The green (red) shaded histogram show the sample of CTNi (CTKi) sources. The first bin includes the 390 sources for which the NH is an upper limit (for clarity the y-axis is rescaled in the range 0−100).
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