Gaia DR3/FLAMES membership selection for the Sextans dSph: (a) spatial distribution of Gaia DR3 positions overlaid with the spectroscopic members. The largest solid orange ellipse is the nominal tidal radius from Irwin & Hatzidimitriou (1995). The dashed line ellipses are from Cicuéndez et al. (2018) (outer) and Roderick et al. (2016) (inner). The black arrow is the mean proper motion on the sky of Sextans and the green arrow is the same for the Pal 3 globular cluster, which is at the position of the green ellipse; (b) Gaia DR3 proper motions in RA and Dec; (c, d) CMDS from Gaia DR3 photometry. In all plots, grey dots are the Gaia DR3 catalogue entries, for G < 19.7. The magenta dots are the 604 likely members of Sextans (P_mem > 0.07). Overplotted as black dots are 333 Gaia/FLAMES members (with S/N > 10 per pixel and G < 19.7) and 146 blue dots from Walker et al. (2023) that are not in the FLAMES catalogue. The nine red stars are in the FLAMES sample with a υ_los consistent with membership, but just outside the Gaia membership criteria. The three red stars with an additional black circle have lower υ_los than the rest of the member stars (υ_los < 190 km/s), but ones that are still within 4σ of the mean systemic υ_los.