Cosmic Structure Traced by Precision Measurements of the X-Ray Brightest   Galaxy Clusters in the Sky
  The current status of our efforts to trace cosmic structure with 10^6 galaxies (2MASS), 10^3 galaxy clusters (NORAS II cluster survey), and precision measurements for 10^2 galaxy clusters (HIFLUGCS) is given. The latter is illustrated in more detail with results on the gas temperature and metal abundance structure for 10^0 cluster (A1644) obtained with XMM-Newton. 
Thomas H. Reiprich (1), Craig L. Sarazin (1), Joshua C. Kempner (2),   Michael F. Skrutskie (1), Gregory R. Sivakoff (1), Ha...