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Table 2

Summary of the cluster member selection.

Cluster Nspec Nspec + Nphot
all red blue all red blue

RXC J0225 228 120 108 1558 765 793
RXC J0528 219 112 107 1126 321 805
RXC J2308 307 173 134 1276 635 641

Notes. Columns: (1) Cluster name. (2–4) Number of spectroscopically confirmed cluster members, and their repartition into the red and blue populations. (5–7) Same as Cols. (2–4), but for the merged catalogues, and limited to mRm + 3.

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