Right ascension (red) and Dec (thick blue) astrometric offsets as a function of S_I/σ_SI. Each flux density bin was chosen to contain 1000 sources and the histograms of the distribution of RA or Dec offsets between our catalogue and Pan-STARRS DR2 were fit with a Gaussian function. The points and error bars show the centre of the fit and ± the standard deviation respectively. Curves fitting the derived standard deviations of RA and Dec as a function of S_I/σ_SI are also shown with the same colour scheme. The black dashed curve shows the behaviour observed through a simple simulation of perfectly compact sources injected into our residual image and characterised with PYBDSF.