Fig. 6.

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Displacements Δi (see Eq. (2)) along the x and y directions of the 90 observed multiple images used to optimize the reference lens model described in this work, color-coded according to the spatial density of the images within 5″. The dashed black circle indicates the total Δrms value of . The histograms show the displacement distribution along each direction, also illustrating the goodness of the model.
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