Fig. 15.
Parameters of 4XMM-DR9s-only sources with one contributing observation. Upper panels: detection likelihoods (panel a) and source counts (panel b) of N_CONTRIB = 1-sources without (blue) and with (red) a DR9 association. Lower panels: panel c: detection likelihoods of DR9s-only sources with N_CONTRIB = 1 in good (blue) and complex (red) sky areas according to the DR9 quality index OBS_CLASS. Panel d: detection likelihoods of DR9s-only sources with N_CONTRIB = 1 (blue) compared to DR9s-only sources in overlap areas (red). All distributions are normalised to the sample size.
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