database)                                       188     208
    hard-only C1 or C2 (`-E`)                                              74     149
    XLSSC clusters                                                        186     142

  : Source numbers for the X-ray catalogues. []{data-label="TabStat"}

![Sky coverage plots in the soft (top panel) and hard (bottom panel) bands. The dashed and dash-dotted lines correspond to XXL-N and XXL-S, and the solid line to the combination of the two. []{data-label="FigSkyCov"}](floriansoft.eps "fig:"){width="8.2cm"} ![Sky coverage plots in the soft (top panel) and hard (bottom panel) bands. The dashed and dash-dotted lines correspond to XXL-N and XXL-S, and the solid line to the combination of the two. []{data-label="FigSkyCov"}](florianhard.eps "fig:"){width="8.2cm"}

The cross-calibration of the S/N using the computed flux errors versus the <span style="font-variant:small-caps;">Xamin</span> detection statistic has been reported above in Fig. \[FigSigma\].

The photometric accuracy of the present pipeline is presented in Fig. 4 of @2013MNRAS.429.1652C, to which we refer the reader since it is unaffected by the changes in the pipeline version.

### Sky coverage\[SecInfo1\]

The sky coverage for XXL-N and XXL-S is shown in Fig. \[FigSkyCov\]. Removing bad fields, i.e. keeping only (`Xbadfield`$<3$), the sky coverage is 95% of that shown. The process of removing duplicates keeps sources in 273 northern and 321 southern pointings, of which respectively 242 and 288 are good. However, since 