Detection map obtained after injecting three fake companions in the NACO β Pictoris reference cube used for the ROC estimation at a distance of 2, 4, and 8 λ∕D with a contrast of 3.3 × 10⁻⁴, 0.4 × 10⁻⁴ and 1.7 × 10⁻⁵, respectively. The colour scale indicates the probability for the RSM map and the S/N for the three S/N maps. The maps are centred on the star β Pictoris while the fake companions are identified by the white circles.