X-SORTER: X-ray Survey Of meRging clusTErs in Redmapper

We propose a firstlook survey of ten galaxy clusters that, based on opticalselection criteria, are likely to be bimodal merging clusters capable ofconstraining dark matter properties. The candidates have >2sigma RASS excessesbut otherwise have not been studied with Xrays. By locating the Xray peak(s)well enough to determine if they have separated from the galaxies, the surveyhas the potential to discover new laboratories to probe the nature of darkmatter. In AO19 2 of 12 targets were observed with Priority C; both are mergersand one is a textbook example with gas between galaxy subclusters. Given theseresults we propose to observe the remaining ten with higher priority. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]