Projected redshift distribution of galaxies with spectroscopic redshift information for the RXC J2306.6−1319 observation. Light-blue circles correspond to galaxies with redshift values of ∼0.068, while pink squares show galaxies with ∼0.109. The black crosses correspond to the position of the MCXC clusters in the observation and the green dotted circle shows the FoV of XMM-Newton (see Fig. 1 for comparison). The purple filled triangle marks the X-ray peak position of A2529, while the blue one of RXC J2306.8−1324. Their corresponding circles show r₅₀₀. In this figure, north is up and east to the left.