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Fig. 1
HST image of the core of LCDCS 0504. The size of the field is 38 × 34 arcsec2, corresponding to 285 × 255 kpc2 at z = 0.794. Multiple imaged systems used in this work are labeled. From the best-fit strong-lensing model, we draw in red the tangential critical curve at z = 3 and the corresponding caustic lines in orange.
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