High-mass fossil clusters discovered through the SZ effect

We propose to observe two fossil clusters discovered in the Planck SZ survey.They are the firstever fossil systems initially discovered via the SZ effect,and, with estimated masses M500 > 3.75 x 10e14 Msun, they are among the highestmass fossil systems yet discovered. With these Xray observations we willinvestigate their density, temperature, entropy and pressure profiles andcompare with reference Xray and SZselected fossil and nonfossil data. We willderive mass profiles and test for adiabatic contraction. As these objects areresolved in Planck, we will combine Xray and SZ observations to investigate thepressure distributions in the outskirts. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]