Infrared observations of serendipitous hard Chandra X-ray sources

Details Infrared observations of serendipitous hard Chandra X-ray sources Infrared observations of serendipitous hard Chandra X-ray sources

2000-05-11

arxiv.org/abs/astro-ph/0005242v1

Mon.Not.Roy.Astron.Soc.324:427,2001

Astronomy and Astrophysics

Astrophysics

Submitted to MNRAS. 15 pages, 10 figures (2 of which are included as separate files)

Scientific paper

10.1046/j.1365-8711.2001.04335.x

We present observations of a sample of optically-faint, hard X-ray sources of the kind likely to be responsible for much of the hard X-ray background. We confirm that such sources are easily detected in the near-infrared, and find that they have a featureless continuum suggesting that the active nucleus is heavily obscured. The infrared colours of the majority of the targets observed are consistent with absorbed elliptical host galaxies at z=1-2. It is likely that we are observing some of the brighter members of the important new class of X-ray Type II quasars.

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