Fig. 2.

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z − HE CMD for a 2′ region centred on the BCG. Only the galaxies with S/N > 3σ in z and HE bands are shown. The expected location of the red sequence at z = 1.74 is shown in pink, while the red sequences at z = 1.4, z = 1.7, and z = 2.0 are in grey. The photometry of the BCG complex is indicated by a cyan symbol. The solid purple line indicates the 50% combined z and HE completeness limit.
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