Offset between the observed and model-predicted (model ID P3ε in Table 1) positions of the multiple images in MACS 1206. Darker hues of red correspond to larger offsets. In the top panel, the histogram shows the distribution of the absolute values of the differences (Δ). In the bottom panel, the circles indicate the observed positions of the multiple images, and the arrows point towards the model-predicted positions. For the sake of clarity, the arrow lengths are ten times larger than the values of the corresponding offsets. The blue sticks represent the shear orientation on a regular grid (see Sect. 3.1) for a source at zsrc = 1.4.
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