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arxiv: astro-ph/0406033 · v1 · pith:6YGPCOKBnew · submitted 2004-06-01 · 🌌 astro-ph

The z>4 Quasar Population Observed by Chandra and XMM-Newton

C. Vignali (INAF-Osservatorio Astronomico di Bologna; Dipartimento di Astronomia , Universita' di Bologna , Italy) , W.N. Brandt , D.P. Schneider (Department of Astronomy & Astrophysics , The Pennsylvania State University , USA) This is my paper
classification 🌌 astro-ph
keywords chandraobtainedquasarsxmm-newtonalongbeenbrieflycases
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The current status of our Chandra and XMM-Newton project on high-redshift (z>4) quasars is briefly reviewed. We report the main results obtained in the last few years for the detected quasars, along with a few (~10%) intriguing cases where no detection has been obtained with Chandra snapshot observations.

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