Probing the M_xray - M_weaklens Relation for Shear-Selected Galaxy Clusters

For the first time we have a sample of galaxy clusters of significant size (> 20clusters) selected on the basis of their weak lensing shear through the DeepLens Survey (DLS). We have obtained an initial look at our highest shear rankedcluster, A781, and 3 surrounding clusters with XMMNewton and Chandra, and fromthis obtained temperature estimates but were unable to constrain their masses.We request deeper XMM and Chandra observations to obtain better mass estimatesto 1.) understand the robustness of weak lensing masses and the biases inherentin shearselected cluster samples, 2.) determine whether M_xray/M_weaklens is auniversal diagnostic of cluster dynamical state, and 3.) characterize one of ourclusters which has an xray but no shear signal. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]