Exploratory Chandra observations of the three highest redshift quasars known

William N. Brandt; Donald P. Schneider; Xiaohui Fan; Michael A. Strauss; James E. Gunn; Gordon T. Richards; Scott F. Anderson; Daniel E. Vanden Berk; Neta A. Bahcall; J. Brinkmann; Robert Brunner; Bing Chen; G. S. Hennessy; Donald Q. Lamb; Wolfgang Voges; Donald G. York

doi:10.1086/340581

Exploratory Chandra observations of the three highest redshift quasars known

William N. Brandt, Donald P. Schneider, Xiaohui Fan, Michael A. Strauss, James E. Gunn, Gordon T. Richards, Scott F. Anderson, Daniel E. Vanden Berk, Neta A. Bahcall, J. Brinkmann, Robert Brunner, Bing Chen, G. S. Hennessy, Donald Q. Lamb, Wolfgang Voges, Donald G. York

Research output: Contribution to journal › Article

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.

Original language	English (US)
Pages (from-to)	L5-L9
Journal	Astrophysical Journal
Volume	569
Issue number	1 II
DOIs	https://doi.org/10.1086/340581
State	Published - Apr 10 2002
Externally published	Yes

Keywords

Galaxies: active
Galaxies: nuclei
Quasars: general
X-rays: galaxies

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/340581

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Brandt, W. N., Schneider, D. P., Fan, X., Strauss, M. A., Gunn, J. E., Richards, G. T., Anderson, S. F., Vanden Berk, D. E., Bahcall, N. A., Brinkmann, J., Brunner, R., Chen, B., Hennessy, G. S., Lamb, D. Q., Voges, W., & York, D. G. (2002). Exploratory Chandra observations of the three highest redshift quasars known. Astrophysical Journal, 569(1 II), L5-L9. https://doi.org/10.1086/340581

Exploratory Chandra observations of the three highest redshift quasars known. / 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.

In: Astrophysical Journal, Vol. 569, No. 1 II, 10.04.2002, p. L5-L9.

Research output: Contribution to journal › Article

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. / Exploratory Chandra observations of the three highest redshift quasars known. In: Astrophysical Journal. 2002 ; Vol. 569, No. 1 II. pp. L5-L9.

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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.",

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AU - Brandt, William N.

AU - Schneider, Donald P.

AU - Fan, Xiaohui

AU - Strauss, Michael A.

AU - Gunn, James E.

AU - Richards, Gordon T.

AU - Anderson, Scott F.

AU - Vanden Berk, Daniel E.

AU - Bahcall, Neta A.

AU - Brinkmann, J.

AU - Brunner, Robert

AU - Chen, Bing

AU - Hennessy, G. S.

AU - Lamb, Donald Q.

AU - Voges, Wolfgang

AU - York, Donald G.

PY - 2002/4/10

Y1 - 2002/4/10

N2 - 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.

AB - 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.

KW - Galaxies: active

KW - Galaxies: nuclei

KW - Quasars: general

KW - X-rays: galaxies

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