Gaia DR3 CMD for Sgr: Panel a: Gaia DR3 CMD of a circle with a radius of 1.0° centred on the centre of Sgr dSph, from which the innermost nuclear region (R < 11.5′) is excised. The stars are colour-coded according to the log of the local density. Panel b: Subset of the stars shown in panel a with a proper motion within 0.5 mas year⁻¹ of the systemic motion of Sgr dSph and parallax within 3σ from 0.0 mas. The 450 stars that are the object of this analysis are plotted in red.