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tokens: We would like to thank Genavie Spence for her work on data analysis, and Samar Safi-Harb for insightful discussions. We would also like to thank the referee for helpful comments. Support for this work was provided by the National Aeronautics and Space Administration through Chandra Award Number GO3-14072, issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-03060. Facilities: CXO , HESS .