Fig. 10
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Image of the GRAVITY Acquisition Camera (H-band) showing the saturated PSF around HR 8799, when observed with MACAO (top) and with GPAO in NGS_VIS (bottom). The scale is normalized to the maximum of the image. The ring structure corresponds to the spatial cutoff frequency of GPAO when controlling 500 modes. The positions of the known exoplanets are shown for reference.
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