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Fig. 1.


Snapshot of the region targeted by our spectroscopic survey. The colour map encodes the information on the galaxy projected surface density at the redshift slice of interest at 0.8 <  z <  0.9 estimated from the catalogue made public by Darvish et al. (2017). Each thick white cross represents a targeted galaxy with a measured spectroscopic redshift in the same redshift slice. The white pentagons show a targeted galaxy with measured spectroscopic redshift, outside the defined redshift slice. The blue circles show the targeted galaxies for which we have no measured spectroscopic redshift available. The orange squares show the location of Hα emitters studied by Sobral et al. (2011). The large red circles denote the location of X-ray-detected clusters from Finoguenov et al. (2007) at the same redshifts. The size of the circle shows the clusters’ estimated X-ray radius r500. We see here that we are probing a large range of densities with our survey, in part due to selection effects (e.g. slit placement constraints).

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