Abstract: Cluster of galaxies have been detected on the XMM-Newton images (due to the cluster X-ray emission) and on the Rz' CTIO images (thanks to the overdensity of galaxies of similar color). Here you find overlays of matches: i.e. of clusters with both detected x-ray emission and galaxies of similar color. Warning: optical center are preliminary, and both Ray and optical images are preliminary reduced. A very preliminary and qualitative choice of optical-X matches is done, without any warranty. Work in progress! Nice matches are found here.

Figure legend: Images are in I band, Cyan square is the optical detection, blue contours are Ray isophotes, small squares are radio detections.
 
 
 
 
 
 
 

more are coming ...
 

as well as color-magnitude diagrams for some clusters
 
 
 
 

Stefano Andreon & Ivan Valtchanov and many others of XMM-LSS, XMDS, Terapix and Virmos collaborations.