Proper motion (left) and K_s vs. i−K_s CMD (right) of our candidate members (HMPS, see text). Grey dots depict candidate members whose cluster membership probability is below the probability threshold p_t but are only included because it sensitivity to the cluster parameters reaches the p_t. The lines represent the MAP of the parameters in the equal-mass binaries (dot-dashed line labelled as MAP EMB) and single stars (dashed line labeled as MAP Singles) models. Standard uncertainties in photometry are in general smaller than symbols.