Scatter plot of the positional error of the γ-ray DBSCAN clusters vs. the positional error of the corresponding associated 2FGL_TS>16 sources. For each 2FGL_TS>16 source associated to one or more γ-ray DBSCAN clusters, we plot the error on the position of the reconstructed cluster centroid and its standard deviation (represented by the error bar). The dashed red line represents a linear best fit with a slope of ≃ 0.99 and an intercept of ≃ 9.53.