Ratio between the galaxy number density around a galaxy and around its corresponding calibration point, as a function of distance. We also plot as visual reference the line where the ratio is 1. Dotted-dashed red: excess type-2 number density around type-2. Solid blue: type-1 number density around type-1. Green dashed: excess type-1 number density around type-2. d_M − S > 0.5 Mpc.