Description
The X-ray Cluster Survey (XCS) has analysed the entire XMM public archive with the primary aim of producing a large catalogue of X-ray selected clusters. To date, ~1000s of extended sources have been identified as clusters of galaxies, many of which have associated optical information. In this talk, I will outline the combination of XCS data and clusters detected in the Dark Energy Survey (DES) using the redMaPPer cluster detection routine. In particular, how this combination of multi-wavelength data helped to place constraints on galaxy cluster cosmology with DES. As a follow-up to this work, I will detail plans to investigate DES redMaPPer clusters with the eROSITA All-Sky Survey (eRASS), offering an unprecedented ~4000 deg^2 area of overlap between the DES and eRASS. Finally, we outline how these results can impact our assumptions in preparation for the cluster samples constructed from Euclid and the Legacy Survey of Space and Time (LSST).
