A Coordinated XMM comma SZE and Optical Survey for Galaxy Cluster Cosmology

We are currently witnessing the opening of a new survey window to the Universethrough the first surveys for galaxy clusters using the SunyaevZeldovich effect(SZE) contributing to the understanding of the nature of Dark Energy. In AO6 wehave been granted observing time for a 6.3 sqdeg. survey to help in theunderstanding and calibration of these surveys in a region where the three majorsurvey experiments have joint forces for an intercomparison of this new type ofcosmological surveys. The first seven pointings have been conducted and analysedand found to be mostly unuseful due to large contamination by soft protonflares, for reasons explained in detail in the proposal. Here we request thereobservations of the fields lost to enable a timely analysis of the survey data. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]