Upper panel: density map obtained with the matched filter (MF) technique, adopting the pattern of weights shown in greyscale in Fig. 12. Lower panel: density map obtained using RGB stars selected to lie within the box shown in Fig. 12. The levels of grey range between 3σ to 8σ above the background, in steps of 1σ, from the lightest to the darkest tone of grey. The density depressions near the center of the main body are due to the low degree of completeness in the very crowded innermost r_ϵ ≤ 0.5′ region.