The Missing X-ray Background

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.

to appear in the proceedings of 'Multiwavelength AGN surveys' (Cozumel, December 8-12 2003), ed. R. Maiolino and R. Mujica

Cited by in corpus (5)

• The INTEGRAL high energy cut-off distribution of type 1 AGN
• The cosmic X-ray background and the population of the most heavily obscured AGNs
• Revealing X-ray obscured quasars in SWIRE sources with extreme mid-IR/optical flux ratios
• NuSTAR observations of water megamaser AGN
• Rolling down from the 30 keV peak: modelling the hard X-ray and gamma-ray backgrounds