Catalogue published by Libralato et al. (2024) demonstrating the 1D-positional root mean square (RMS) precision of Euclid/VIS imaging astrometry.Mild saturation begins at I_E ∼ 19 (shaded light grey regions), while sources brighter than ~18 are severely saturated (region in dark grey). The region of the sources accessible to Gaia is indicated by a shaded region in azure. Top: quality-fit parameter (see Libralato et al. 2024, this parameter quantifies how well a source profile resemble the PSF model) as a function of the calibrated VIS-magnitude in filter I_E. Middle: illustration of the astrometric precision as function of the magnitude (in VIS pixels on left axis, and in milli-arcseconds on the right axis). Bottom: the precision is as good as 20 mas in a single exposure for sources at I_E ∼ 26, but it can reach sub-mas precision on a single image for well-exposed unsaturated point sources.