Left panel: PPM plots for DES-RG 399 and 708. In each plot the vertical solid line shows the spectroscopic redshift of each radio source. Colored dots refer to significance levels >2σ (cyan), 3σ (green), 4σ (blue), 5σ (red), 6σ (brown), and 7σ (black). Right panel: Gaussian density maps centered at the projected space coordinates of the radio galaxies. The pixel size is 1/16 Mpc while the Gaussian kernel has σ = 3/16 Mpc. Sources with SDSS photometric redshifts between and were considered to produce the maps, where z_ov and are reported in Table 7, for each overdensity. The solid black and dashed red circles are centered at the projected space coordinates of the radio source. The former has a (physical) radius of 1 Mpc, estimated at z_ov, while the latter, with a radius ℛ_PPM, denotes the region within which the PPM detects the overdensity. The dotted-dashed green circle is centered at the peak of the detection as found by the wavelet transform and has a radius ℛ_w.