Fig. 2.
Radial density profiles for the OCRs NGC 2180, Lynga 8, Bica 5, NGC 7036, Alessi 3, and ESO 426-SC26. Symbols representing different bin sizes are overplotted. For each cluster, the inset shows the region (dashed rectangle) selected for estimation of the mean background density (σsky, continuous lines) and its 1σ uncertainty (dotted lines).
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