|RM| as function of weighted mean impact parameter for the photometric sample. Upper panel: we plot the observed |RM| in rad m⁻² vs. the weighted median impact parameter in kpc from the photometric catalog provided by Hatfield et al. (2022) within an impact parameter of 133 kpc around each host for the COSMOS field. The green bar indicates a bin of individual data points with the blue line being the error bar of the bin. The individual data points are color-coded with respect to the total number of intervenors to each host. Lower panel: corresponding plot for the XMM-LSS field.