Fig. B.3

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Medium-resolution (R = 1500) AMBER/VLTI data centered on the Brγ line. Some uncalibrated visibilities from a calibrator are shown in the upper row as a visual noise estimate. The dataset on the science consists of 5 consecutive observations providing for each, three dispersed visibilities (this figure), three differential phases and one closure phase (next figure). The decrease of the dispersed visibilities betray some extended emission, particularly in the NaI sodium line of HR 5171 A whereas no signal is observed in the Brγ line. No significant interferometric signal is observed in the data from V382 Car.

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