X-ray observations of high-redshift quasars

GTThis study aims at a detailed spectral comparison of highz radioloud and radioquiet quasars. The data can provide new insights in quasar formationprocesses, the evolution and the enigmatic radioloud/quiet dichotomy. Inparticular the following questions can be addressed: Do spectral differencesbetween radioloud and radioquiet quasars persist to high redshifts? Do radioquiet quasars show intrinsic absorption similar to radioloud quasars, and dothey show spectral evolution? High redshift quasars further serve as background sources to study intervening systems like the intergalactic mediumand damped Lyalpha systems. Is is important to note that XMM provides the last possibility for the foreseeable future to study the Xray spectra of RQQs. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]