Real and imaginary parts of the measured visibilities of Per-emb-50 as a function of the deprojected baseline, assuming the PA and i from Table 1. The data are averaged in 8 kλ bins. The error bars in the real parts show the statistical standard errors of visibilities in each bin. Red and blue shaded areas show the 20 and 10% flux calibration uncertainties of the SMA and NOEMA data, respectively. Red and blue dashed lines are the disk average fluxes using baselines larger than 47 kλ.