Fig. 1.
Magnification pattern for a halo at zl = 0.4 with mass 2 × 1015 M⊙ and for a source at redshift zs = 4. Left panel: logarithm of the magnification and critical curves in the image plane (field of view is 2.71 arcmin across). Right panel: logarithm of the magnification and caustics in the source plane (field of view is 1.355 arcmin across) obtained by inverse ray shooting.
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