Positions of MSP candidates after successive selections: conservative selection of Berteaud et al. (2021) (dark blue) after removing those with optical (Sect. 3.1, blue), UV (Sect. 3.2, teal), strong NIR (Sect. 3.3.2, green), and FIR (Sect. 3.3.4, yellow) counterparts. Some of these sources have a potential VLA (radio) counterpart and/or are compact-object (CO) candidates (red crosses). Sources from the conservative selection of Berteaud et al. (2021) for which we found an optical counterpart therefore appear as single dark blue circles; those without an optical counterpart but with a UV one appear as a blue circle with a dark blue ring, etc. The shaded region shows the approximate coverage of the VLA mosaic (orange). The spatial distribution of the candidates is correlated with the sensitivity threshold of Chandra.