Map showing the location of sky pixels belonging to the target1 (white) and control (orange) samples. Black pixels are those in all but neither in target1 nor control. The gray area are pixels where has not be determined (see Panopoulou & Lenz 2020). The locations of the northern and southern sky patches studied in order to investigate the effect of target and control sampling different sky regions are shown with the green and magenta circles, respectively.