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Fig. 1

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Pointings of the various instruments used for this monitoring campaign: CFHT/MegaCam (red square), Maidanak (cyan square), CrAO, Byurakan (white circle). The field of view observed in the optical by Currie et al. (2010; blue rectangles) and in the near-infrared with CFHT/WIRCam by Cardoso et al. (in prep.; yellow square) are also shown. Their photometry is used to assess membership (see Sect. 2.3).

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