Left: distribution of red giant stars in NGC 3201 in pseudo-colour space, the so-called chromosome map. The full sample of stars obtained from the HST photometry of Piotto et al. (2015) is shown as small grey dots. Stars available in the MUSE sample are highlighted and colour-coded according to their probability of being in a binary system. For the sub-sample of MUSE sources with known Keplerian parameters, coloured rings indicate the orbital period T. The dashed red line illustrates our separation into P1 and P2 stars. Right: the binary probability of the stars in the MUSE sample is shown as a function of the distance of a star perpendicular to the line separating P1 and P2 (i.e. the dashed red line in the left panel).