Completeness histograms as a function of radius and g′ magnitude for our sample (P_μ ⩾ 1%). Dashed lines show the completeness of stars with ⩾1 radial velocity measurements. Solid lines show the completeness of stars with ⩾3 measurements over the course of at least 200 days (for which we can determine radial velocity membership). In the left panel, we present radius in both arcminutes and core radii for R_c = 3.8 pc (P11) at a distance of 4 kpc (Grundahl et al. 2008). The dot–dashed vertical line marks the tidal radius of the cluster at 231 (~27 pc; P11).