Spectra, squared visibilities, differential phases and closure phase of the Brγ line observed by AMBER. The top and bottom panels display the high- and medium-resolution data, respectively. Error bars are calculated as the 1σ noise level in the continuum. The array configurations, baseline lengths and position angles (N through E) are displayed in the top right corners of the panels. Colored squares in the bottom right corners connect properties of identical baselines.