Elongation E_z/xy as a function of R_e,xy. The different colours refer to the different peaks as in the legend. E_z/xy and R_e,xy are measured by fixing different thresholds (number of σ_δ above the mean density) to define the peaks themselves, ranging from 4.1 to 7σ_δ. E_z/xy and R_e,xy measured at the 5σ_δ threshold are highlighted with a filled circle, and are the same quoted in Table 2. The peaks [1] and [2] are split into two smaller peaks when δ_gal is above 5.5σ_δ and 5.7σ_δ above the mean density, respectively: this is shown in the plot by splitting the curve of the two peaks into two series of circles (filled and empty). The three dotted lines corresponds to the curves y = 1 + A/x, with A = 4.3, 2.9, 1.5 from top to bottom. The values of A are chosen to make the curves overlap with some of the data, to guide the eye.