A broad iron K alpha line at z=1.146

Details A broad iron K alpha line at z=1.146 A broad iron K alpha line at z=1.146

2004-04-19

arxiv.org/abs/astro-ph/0404364v1

Mon.Not.Roy.Astron.Soc. 351 (2004) L9

Astronomy and Astrophysics

Astrophysics

5 pages, 5 figures, MNRAS, in press

Scientific paper

10.1111/j.1365-2966.2004.07929.x

We report the discovery of a strong iron K alpha line in the hard X-ray selected source CXOJ 123716.7+621733 in the Chandra Deep Field North survey at z=1.146. The analysis is made possible by the very deep exposure ~2 Ms and low background of the ACIS detector. The line profile seems to be inconsistent with a narrow feature. The best fit solution is achieved with a broad line. Most of the flux in the broad component originates at energies below 6.4 keV with a shape similar to that expected from emission in the innermost regions of the accretion disk.

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