X-ray continua of radio-quiet quasars: Testing accretion disk models. SSC_6

We propose to measure the spectra of bright radioquiet quasars, using the XMMEPIC pn and MOS detectors. The objects are taken from a sample which we havealready previously studied using the ROSAT PSPC detector. All objects areprominent radioquiet quasars which have already been studied extensively inthe optical and Xray spectral range. The high statistical significance of theXMM spectra will for the first time permit us to separate different soft andhard emission components based on contemporaneous data taken with the sameinstrument. In particular, using an accretion disk model code, developed by us,it will be possible to determine the properties of their accretion disks whichare thought to contribute most of the emission in the soft Xray range. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]