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tokens: MP is supported by NASA through Einstein Postdoctoral Fellowship grant number PF3 140113 awarded by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under contract NAS8-03060 . We thank Katya Giannios for suggestions on the title. The simulations were performed on XSEDE resources under contract No. TG-AST120010 , and on NASA High-End Computing (HEC) resources through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center. We also gratefully acknowledge access to the PICSciE-OIT High Performance Computing Center and Visualization Laboratory at Princeton University.