Realpart of the visibilities as a function of baseline. Left panels: 1.3 mm data. Right panels: 2.7 mm data. Upper panels: models with the disk model M1. Bottom panels: models using disk model M2 (see Table 6). In solid lines we present models with grain sizes of a_max ≤ 100 μm. In dashed lines are models with grain sizes of a_max = 300, 1000 μm. The best fits are the models with a distribution of grain sizes with a_max ≤ 100μm. The red shaded region is the uncertainty on the data due to flux calibration. The bottom of each panel shows the residuals between the data and the model with different a_max.