Excess source galaxy density ratio as a function of projected distance to the lenses. The green squares (blue triangles) indicate the excess density ratio measured using sources within 45 degrees of the major (minor) axis. The arrows indicate the location of the virial radius at the mean redshift of the lenses. We find that the excess density ratio along the major axis is higher than along the minor axis, most noticeably for the “red” sample. Please note the different scales of the vertical axes.