Examples of extreme galaxy profiles in SM CCDs simulated with GIBIS. Exponential disk profiles are shown in the left panel, while de Vaucouleurs profiles are shown in the right panel. The colour map is logarithmic and encodes the flux in each pixel in electrons. The profiles do not appear circularly symmetric since the pixels in this representation are square while Gaia’s pixels are rectangular. In our detection-performance assessment (Sect. 7.2), individual images of all objects, at the correct angle for each transit, are generated and analysed.
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