The Missing X-ray Background
Astrophysics
2017-08-23 v1
Abstract
The fraction of the hard X-ray background (XRB) resolved into individual sources by the deep Chandra and XMM-Newton surveys strongly depends on the adopted energy range and decreases with increasing energy. As a consequence, the nature of the sources of the even harder (>10 keV) XRB remains observationally poorly constrained. I will briefly discuss the need for X-ray observations above 10 keV.
Cite
@article{arxiv.astro-ph/0406031,
title = {The Missing X-ray Background},
author = {A. Comastri},
journal= {arXiv preprint arXiv:astro-ph/0406031},
year = {2017}
}
Comments
to appear in the proceedings of 'Multiwavelength AGN surveys' (Cozumel, December 8-12 2003), ed. R. Maiolino and R. Mujica