Fig. 4
Sensitivity of SEWIN coordinates to the size of the PSF and galaxy pair. The distinction between the small (red) and large (blue) couples is a factor 1.8 in full width at half maximum of both the PSF and the galaxy, covering the range from the smallest to the widest PSFs in GREAT10. For the present MegaLUT implementation, the measurement of the size ratio r should ideally not depend on this rescaling.
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