Fig. E.2

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Aspro synthetic data test images for the small, medium, and large configurations of GRAVITY. The top-left model was used to generate the synthetic visibilities and closure phases with Aspro. The resulting fitted models are shown for the respective configurations. The intensity scale is linear and ranges from zero to the peak pixel value of the asymmetry. The central star is not displayed and its position is marked with the white cross. The images have a size of 20×20 mas. It is visible from this figure and Table E.1 that the small configuration properly constrains the absence of halo contribution in the system, but not the disk morphology, as opposed to the large configuration.
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