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X-rays from the High-Redshift Universe: The Chandra view

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arxiv astro-ph/0210309 v1 pith:SND3X325 submitted 2002-10-14 astro-ph

C. Vignali (1) , W.N. Brandt (1) , D.P. Schneider (1) , G.P. Garmire (1) , S. Kaspi (2) , F.E. Bauer (1) , D.M. Alexander (1) ((1) Department of Astronomy & Astrophysics , The Pennsylvania State University
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University Park USA; (2) School of Physics Astronomy Raymond Beverly Sackler Faculty of Exact Sciences Tel-Aviv University Israel)
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The study of the X-ray properties of z>4 quasars has grown substantially over the last few years, mostly thanks to Chandra. Here we focus on (1) the average X-ray properties of an optically selected, luminous sample of nine z>4 Palomar Digital Sky Survey quasars recently observed by Chandra, and (2) the X-ray spectral properties of three z>4 AGNs in the Chandra Deep Field-North (CDF-N) using the 2 Ms exposure.

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