Fig. 7

image

Distribution of background values and cleaned exposure times measured for both XXL fields. Green, blue, and pink areas in the top and middle figures indicate the ranges defining the accepted, usable, and rejected observations, respectively (see Sect. 3.3 for the definition of the thresholds). The bottom panel shows the corresponding two-dimensional distribution; the dashed and dotted lines delineate the three quality ranges.

This figure is made of several images, please see below:

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