Comparison of the observed interferometric data and the corresponding observables from the reconstructed image shown in Fig. 2b. The observed data are plotted with the red (black in the printed edition) symbols with the error bars shown in green (light gray), while the model is represented by the blue (dark gray) symbols. a) Visibilities. b) Enlarged view of the visibilities obtained by speckle interferometry with NACO. c) and d) enlarged views of the visibilities obtained with AMBER in two different spatial frequency ranges. e) Closure phases.