in both bands), which are not included in the released catalogue. We have 26555 merged detections in XXL-N, of which 17398 are non-spurious. The respective numbers for XXL-S are 27173 and 18145.\
A band-merged detection in two bands that is spurious in one band (flagged by the boolean flags `Bspurious=1` or `CDspurious=1`) still provides some usable information (rate, flux, etc.) and is retained in the catalogue.\
For detections in two bands, the band in which the detection likelihood of the source is the highest is the band from which the coordinates are taken. If we compare the separation between B and CD positions (column `Xmaxdist` in the database) with the positional uncertainties in the two bands added in quadrature ($\sigma$) we find that `Xmaxdist`$<\sigma$ in 33% of the cases, within $2\sigma$ in 71% of the cases and within $3\sigma$ in 77%, which looks reasonable.\
It is possible to have an ambiguous band merging case when a detection in a band happens to be associated with two different objects in the other band (i.e. it gives rise to two entries in the merged table). If the two entries both have `Xmaxdist`$<6\arcsec$ or `Xmaxdist`$>6\arcsec$, they are both retained as intrinsically ambiguous. If 