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Fig. 3
WIRC J, H, Ks number counts for A983 (top) and A1731 (bottom). The histograms show the number of sources per bin of magnitudes J, H, and Ksfrom left to right, respectively. The overplotted filled histograms show the depth of the archival 2MASS data in the same region of the sky covered by the WIRC observations.
This figure is made of several images, please see below:
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