Left panel: real part of the visibilities for CIDA 1. The model with the best-fit parameters is over-plotted. Middle panel: residuals after subtracting the best-fit model from data. Right panel: best fit intensity model, which is normalized to the value at the location of peak of the ring. In addition, 200 samples from the chain are over-plotted (light pink lines). The top panels correspond to a model with a radially symmetric ring (Eq. (3)) and the bottom panels correspond to a Gaussian with different inner and outer widths with respect to the peak.