Medium-resolution (R = 1500) AMBER/VLTI data centered in the CO molecular band. Some uncalibrated visibilities from a calibrator are shown in the upper row as a visual noise estimate. The dataset consists of three dispersed differential visibilities scaled to the level of the absolute visibility obtained using a calibrator. The spectrum (in arbitrary units) is shown in color at the bottom of each panel. The decrease in the dispersed visibilities betray some extended emission.
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