Best-fit model for the lens light distribution. Left image: observation of the Cosmic Horseshoe in the F160W band, whereas central panel: predicted light distribution. This model includes three chameleon profiles (see Eq. (14)), two PSF profiles, and one de Vaucouleurs profile for the three objects. The right image shows, in the range between −7σ and +7σ, the normalized residuals of this model. The constant gray regions are the masked-out areas (containing lensed arcs and neighboring galaxies) to fit only to the flux of the lens The figures are oriented such that north is up and east is left.
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