Stacked source distribution maps and their asymmetry profiles. Left: stacked maps of mean number of sources per cMpc² for all the fields (left), only the ELANe (center), and only the quasar fields (right). For the maps on the top row the preferred direction is given by α_rms and the ones on the bottom by α_inertia. The black contours in each map enclose increasing fractions of sources from 0.1 for the innermost contour to 1.0 for the outermost one in steps of 0.1. Right: asymmetry profiles of the stacked source distribution maps. The x-axis gives the radius of the circularized area of the contours, , in comoving megaparsecs. From left to right, the points correspond to the asymmetry within the contours enclosing increasing fractions of sources, from 0.1 to 1.0 in steps of 0.1. For the profiles in the top panel, the stacking has been done after rotating each field by its α_rms, while for the ones in the bottom panel the fields have been rotated by α_inertia. The horizontal dashed black line together with its gray band (in both panels) marks the level of asymmetry of 0.06  ±  0.03 corresponding to stacks of all 20 fields where the positions of the sources have been randomized.