Density profile of GC candidates in the elliptical over-density region obtained by subtracting annular background (left panel) and random background (right panel). The grey shaded region in both the panels beyond 26′ represents the annular background region. The red and green dotted horizontal lines and shaded regions in the left and right panels, respectively, represent the mean and RMS_MAD density values within elliptical radius R_ellipse < 25′. The yellow shaded regions in both the panels represent the region encompassing NGC 5018 and other GC over-densities surrounding the group (see Sect. 6.1).