Fig. 1

Layout of the JH survey in the (α,δ) plane (equinox J2000). First-epoch J-band data are plotted in black, second-epoch H-band detections are shown in red. Green stands for the HAWK-I methane images. For reference, eight well-known bright stars of the Pleiades are indicated with asterisks. The common JH area is ~0.8 deg2. North is up and east is to the left.
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