Fig. 2
Locations of the NACO fields (Ks-band observations) overlaid on the Subaru/CISCO J-band image of the Arches cluster. Circles illustrate distances of 0.2, 0.4, 1, 1.5, and 2 pc from the center of the cluster. The central field (field 1) was observed in Ks and H. The two dot-dashed boxes represent the Ks calibration frames (see Sect. 3.2). North is up and east to the left.
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