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Fig. 10.


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Predicted (green arrows) and observed (cyan dashed circles) positions for multiple lensed images of system 18 (left panel) and the PDF of the redshift obtained from the strong-lensing model (right panel). From the redshift PDF we get a median value of zs18 = 1.70 ± 0.15 with a Δ RMS = 0 . 7 ± 0 . 5 $ \Delta_{\mathrm{RMS}} = 0{{\overset{\prime\prime}{.}}}7 \pm 0{{\overset{\prime\prime}{.}}}5 $. The critical line for a source at this redshift is also shown in the right panel.

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