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

作者：Brandt WN^*; Guainazzi M; Kaspi S; Fan X; Schneider DP; Strauss MA; Clavel J; Gunn JE

来源：Astronomical Journal, 2001, 121(2): 591-597.

DOI：10.1086/318760

• galaxies : active
• galaxies : nuclei
• quasars : general
• quasars : individual (SDSSp J104433.04-012502.2)
• X-rays

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 alpha (ox) = -1.91 +/- 0.05 and a 3.4-13.6 keV luminosity of approximate to1.8 x 10(44) ergs s(-1). The most likely reason for a its X-ray weakness is heavy absorption with N-H greater than or similar to 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 mum to search for blueshifted C IV absorption may elucidate the origin of the X-ray weakness.

• 出版日期2001-2