X-ray Absn. in the Most-Distant Radio-Loud Quasars: Widespread or Exceptional?

Physics

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Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Sdss 0011+1446, Class J0918+063, Pmn J0214-0518

Scientific paper

We propose to extend our systematic X-ray studies of the most-distant known quasars with XMM-Newton spectroscopy of five typical radio-loud quasars (RLQs) at z = 3.98-4.97. Our targets are more representative of the overall RLQ population than the small number of highly radio-loud blazars studied at z ~ 4, and we have detected all targets in exploratory Chandra observations. We will search for X-ray absorption in the quasars' environments to determine if it is common among typical RLQs at the highest redshifts. We will also measure X-ray continuum shapes and search for variability and clustered AGN.

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