An XMM-Newton detection of the z = 5.80 X-ray-weak quasar SDSSp J104433.04012502.2

W. N. Brandt; M. Guainazzi; S. Kaspi; X. Fan; D. P. Schneider; Michael A. Strauss; J. Clavel; J. E. Gunn

doi:10.1086/318760

An XMM-Newton detection of the z = 5.80 X-ray-weak quasar SDSSp J104433.04012502.2

W. N. Brandt, M. Guainazzi, S. Kaspi, X. Fan, D. P. Schneider, Michael A. Strauss, J. Clavel, J. E. Gunn

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Abstract

We report on an XMM-Newton observation of the most distant known quasar, SDSSp J104433.04-012502.2, at z = 5.80. We have detected this quasar with high significance in the rest-frame 3.4-13.6 keV band, making it the most distant cosmic object detected in X-rays; 32 ± 9 counts were collected. SDSSp J104433.04-012502.2 is notably X-ray-weak relative to other luminous, optically selected quasars, with α_ox = -1.91 ± 0.05 and a 3.4-13.6 keV luminosity of ≈ 1.8 × 10⁴⁴ ergs s^-1. The most likely reason for its X-ray weakness is heavy absorption with N_H ≳ 10²⁴ cm^-2, as is seen in some broad absorption line quasars and related objects; we discuss this and other possibilities. High-quality spectroscopy from 0.95-1.10 μm to search for blueshifted C IV absorption may elucidate the origin of the X-ray weakness.

Original language	English (US)
Pages (from-to)	591-597
Number of pages	7
Journal	Astronomical Journal
Volume	121
Issue number	2
DOIs	https://doi.org/10.1086/318760
State	Published - Feb 2001

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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title = "An XMM-Newton detection of the z = 5.80 X-ray-weak quasar SDSSp J104433.04012502.2",

abstract = "We report on an XMM-Newton observation of the most distant known quasar, SDSSp J104433.04-012502.2, at z = 5.80. We have detected this quasar with high significance in the rest-frame 3.4-13.6 keV band, making it the most distant cosmic object detected in X-rays; 32 ± 9 counts were collected. SDSSp J104433.04-012502.2 is notably X-ray-weak relative to other luminous, optically selected quasars, with αox = -1.91 ± 0.05 and a 3.4-13.6 keV luminosity of ≈ 1.8 × 1044 ergs s-1. The most likely reason for its X-ray weakness is heavy absorption with NH ≳ 1024 cm-2, as is seen in some broad absorption line quasars and related objects; we discuss this and other possibilities. High-quality spectroscopy from 0.95-1.10 μm to search for blueshifted C IV absorption may elucidate the origin of the X-ray weakness.",

author = "Brandt, {W. N.} and M. Guainazzi and S. Kaspi and X. Fan and Schneider, {D. P.} and Strauss, {Michael A.} and J. Clavel and Gunn, {J. E.}",

year = "2001",

month = feb,

doi = "10.1086/318760",

language = "English (US)",

volume = "121",

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journal = "Astronomical Journal",

issn = "0004-6256",

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T1 - An XMM-Newton detection of the z = 5.80 X-ray-weak quasar SDSSp J104433.04012502.2

AU - Brandt, W. N.

AU - Guainazzi, M.

AU - Kaspi, S.

AU - Fan, X.

AU - Schneider, D. P.

AU - Strauss, Michael A.

AU - Clavel, J.

AU - Gunn, J. E.

PY - 2001/2

Y1 - 2001/2

N2 - We report on an XMM-Newton observation of the most distant known quasar, SDSSp J104433.04-012502.2, at z = 5.80. We have detected this quasar with high significance in the rest-frame 3.4-13.6 keV band, making it the most distant cosmic object detected in X-rays; 32 ± 9 counts were collected. SDSSp J104433.04-012502.2 is notably X-ray-weak relative to other luminous, optically selected quasars, with αox = -1.91 ± 0.05 and a 3.4-13.6 keV luminosity of ≈ 1.8 × 1044 ergs s-1. The most likely reason for its X-ray weakness is heavy absorption with NH ≳ 1024 cm-2, as is seen in some broad absorption line quasars and related objects; we discuss this and other possibilities. High-quality spectroscopy from 0.95-1.10 μm to search for blueshifted C IV absorption may elucidate the origin of the X-ray weakness.

AB - We report on an XMM-Newton observation of the most distant known quasar, SDSSp J104433.04-012502.2, at z = 5.80. We have detected this quasar with high significance in the rest-frame 3.4-13.6 keV band, making it the most distant cosmic object detected in X-rays; 32 ± 9 counts were collected. SDSSp J104433.04-012502.2 is notably X-ray-weak relative to other luminous, optically selected quasars, with αox = -1.91 ± 0.05 and a 3.4-13.6 keV luminosity of ≈ 1.8 × 1044 ergs s-1. The most likely reason for its X-ray weakness is heavy absorption with NH ≳ 1024 cm-2, as is seen in some broad absorption line quasars and related objects; we discuss this and other possibilities. High-quality spectroscopy from 0.95-1.10 μm to search for blueshifted C IV absorption may elucidate the origin of the X-ray weakness.

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JO - Astronomical Journal

JF - Astronomical Journal

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An XMM-Newton detection of the z = 5.80 X-ray-weak quasar SDSSp J104433.04012502.2

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