086115

We propose three XMM-Newton snapshot observations to detect all the point sources in the region between the double galaxy cluster A3528 and the complex A3530-A3532 comma in which we have discovered hints of a filamentary emission. These snapshots will complement our Suzaku observations. We aim to detect the hottest and densest phase of the Warm Hot Intergalactic Medium in the vicinity of clusters by its thermal soft X-ray emission. For this purpose comma we will use the XMM-Newton observations to correct precisely for the point sources comma resulting in an improvement of the temperature measurement uncertainty by a factor of three. In addition to a full understanding of the typical baryon fraction comma we will study the possible gas clumping in the cluster outskirts.