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

Research output: Contribution to journalArticle

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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 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.

Original languageEnglish (US)
Pages (from-to)591-597
Number of pages7
JournalAstronomical Journal
Volume121
Issue number2
DOIs
StatePublished - Feb 1 2001

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XMM-Newton telescope
quasars
newton
x rays
erg
spectroscopy
luminosity
detection

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Brandt, W. N. ; Guainazzi, M. ; Kaspi, S. ; Fan, X. ; Schneider, D. P. ; Strauss, Michael A. ; Clavel, J. ; Gunn, J. E. / An XMM-Newton detection of the z = 5.80 X-ray-weak quasar SDSSp J104433.04012502.2. In: Astronomical Journal. 2001 ; Vol. 121, No. 2. pp. 591-597.
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Brandt, WN, Guainazzi, M, Kaspi, S, Fan, X, Schneider, DP, Strauss, MA, Clavel, J & Gunn, JE 2001, 'An XMM-Newton detection of the z = 5.80 X-ray-weak quasar SDSSp J104433.04012502.2', Astronomical Journal, vol. 121, no. 2, pp. 591-597. https://doi.org/10.1086/318760

An XMM-Newton detection of the z = 5.80 X-ray-weak quasar SDSSp J104433.04012502.2. / Brandt, W. N.; Guainazzi, M.; Kaspi, S.; Fan, X.; Schneider, D. P.; Strauss, Michael A.; Clavel, J.; Gunn, J. E.

In: Astronomical Journal, Vol. 121, No. 2, 01.02.2001, p. 591-597.

Research output: Contribution to journalArticle

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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.

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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.

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