Squared visibilities of GJ65 A and B and adjusted uniform disk models. The statistical dispersion and the calibration systematic uncertainty are listed separately after the best-fit angular diameter. The dashed lines delimit the 1σ total uncertainty of the fit. The (u,v) plane coverage is shown in the top right panel, with axes labeled in meters. The residuals of the model fit are shown in the bottom panels, and the reduced χ² values are computed considering only the statistical uncertainties.