GRAVITY observations of DO Tau with the AT (top) and with the UT (bottom) configurations of the VLTI. The visibilities squared (left) and closure phases (middle) for the central spectral channel of binned data (λ = 2.15 μm) are plotted as a function of the spatial frequency. The corresponding (u, v) planes over the K band are plotted in the right panels. The blue symbols at the bottom of the visibility and closure phase curves display the amplitude of the residuals of the best-fit ring models. See text for detail.