WE PROPOSE DEEP OBSERVATIONS OF 4 LOW REDSHIFT RELAXED CLUSTERS WITH EXTENSIVE XMM AND CHANDRA (AND FUTURE XRISM) DATA WHERE BOTH CALIBRATION AND PHYSICAL DIFFERENCES CAN BE ASSESSED IN THE SIMPLEST POSSIBLE SYSTEMS.
$117,292FY2021National Aeronautics and Space AdministrationNASA
University Of Utah, Salt Lake City UT