@article{2b8cee702934499b8aa9b972d9d9cf6f,
title = "Exploratory Chandra observations of the three highest redshift quasars known",
abstract = "We report on exploratory Chandra observations of the three highest redshift quasars known (z = 5.82, 5.99, and 6.28), all found in the Sloan Digital Sky Survey. These data, combined with a previous XMM-Newton observation of a z = 5.74 quasar, form a complete set of color-selected, z>5.7 quasars. X-ray emission is detected from all of the quasars at levels that indicate that the X-ray-to-optical flux ratios of z ≈ 6, optically selected quasars are similar to those of lower redshift quasars. The observations demonstrate that it will be feasible to obtain quality X-ray spectra of z ≈ 6 quasars with current and future X-ray missions.",
keywords = "Galaxies: active, Galaxies: nuclei, Quasars: general, X-rays: galaxies",
author = "Brandt, {William N.} and Schneider, {Donald P.} and Xiaohui Fan and Strauss, {Michael A.} and Gunn, {James E.} and Richards, {Gordon T.} and Anderson, {Scott F.} and {Vanden Berk}, {Daniel E.} and Bahcall, {Neta A.} and J. Brinkmann and Robert Brunner and Bing Chen and Hennessy, {G. S.} and Lamb, {Donald Q.} and Wolfgang Voges and York, {Donald G.}",
note = "The use of the Gauss-Hermite Pixel Fitting Software developed by R. P. van der Marel and M. Franx is gratefully acknowledged. The ESI data were reduced using software developed in collaboration with D. Sand. We thank E. Agol, A. Benson, G. Bertin, R. Blandford, C. Conselice, R. Ellis, and M. Stiavelli for comments on this manuscript. We acknowledge the use of the HST data collected by the CASTLES collaboration. L. V. E. K. and T. T. acknowledge support by grants from NSF and NASA (AST 99-00866, STScI-GO 06543.03-95A, and STScI-AR-09222).",
year = "2002",
month = apr,
day = "10",
doi = "10.1086/340581",
language = "English (US)",
volume = "569",
pages = "L5--L9",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "American Astronomical Society",
number = "1 II",
}