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          Institute: MPI für extraterrestrische Physik     Collection: High Energy Astrophysics at MPE     Display Documents

ID: 5911.0, MPI für extraterrestrische Physik / High Energy Astrophysics at MPE
Exploratory Chandra observations of the three highest redshift quasars known
Authors:Brandt, William N.; Schneider, Donald P.; Fan, Xiaohui; Strauss, Michael A.; Gunn, James E.; Richards, Gordon T.; Anderson, Scott F.; Vanden Berk, Daniel E.; Bahcall, Neta A.; Brinkmann, J.; Brunner, Robert; Chen, Bing; Hennessy, G. S.; Lamb, Donald Q.; Voges, Wolfgang; York, Donald G.
Date of Publication (YYYY-MM-DD):2002-04-10
Title of Journal:The Astrophysical Journal
Journal Abbrev.:Astrophys. J.
Issue / Number:1
Start Page:L5
End Page:L9
Review Status:Peer-review
Audience:Experts Only
Abstract / Description: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 approximate to 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 approximate to 6 quasars with current and future X- ray missions.
Free Keywords:galaxies : active; galaxies : nuclei; quasars : general; quasars : individual (SDSS J083643.85+005453.3; SDSS J130608.26+035626.3; SDSS J130608.26+035626.3); X-rays : galaxies
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für extraterrestrische Physik
External Affiliations:Penn State Univ, Dept Astron & Astrophys, Davey Lab 525,; University Pk, PA 16802 USA; Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA; Princeton Univ Observ, Princeton, NJ 08540 USA; Univ Washington, Dept Astron, Seattle, WA 98195 USA; Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA; Apache Point Observ, Sunspot, NM 88349 USA; CALTECH, Dept Astron, Pasadena, CA 91125 USA; European Space Agcy VILSPA, XMM Sci Operat Ctr, E-28080 Madrid, Spain; USN Observ, Washington, DC 20392 USA; Univ Chicago, Ctr Astron & Astrophys, Chicago, IL 60637 USA; Max Planck Inst Extraterr Phys, D-85740 Garching, Germany
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