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Fig. 5

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Shear (upper panels) and convergence (lower panels) maps generated by the external perturbation and experienced by the SL system whose centre is given by the red cross. The total mass is fixed to the same value (5.7 × 1014   M) in all panels. Panel sizes are 600 × 600 square arcseconds, and the smoothing scales s vary as indicated on each panel. White contours correspond to shear levels of 0.1 and convergence levels of 0.1 and 0.2. One can appreciate how the shear and convergence generated by the group are correlated with the smoothing scale.

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