(Top) uv plane at the time of the observation (average over the full exposure) with the different baselines indicated by colored points. The gray line represents the expected jet PA. (Bottom) K-band GRAVITY spectrum (the solid blue/red line corresponds to the emission of the approaching/receding jet components) as well as the visibility amplitudes (left) and phases (right) for the six baselines. The solid line corresponds to the best fit model of the jet lines (see Sect. 3.2.2). The symbol colors correspond to the baseline colors indicated in the uv plane.