# SEYFERT GALAXIES AND THE HARD X-RAY BACKGROUND: ARTIFICIAL CHANDRA OBSERVATIONS OF z = 0.3 ACTIVE GALAXIES

@article{Peterson2005SEYFERTGA,
title={SEYFERT GALAXIES AND THE HARD X-RAY BACKGROUND: ARTIFICIAL CHANDRA OBSERVATIONS OF z = 0.3 ACTIVE GALAXIES},
author={Kelly Peterson and S. C. Gallagher and A Hornschemeier and Michael P. Muno and E. C. Bullard Ucla and Nasa Gsfc and Mit},
journal={The Astronomical Journal},
year={2005},
volume={131},
pages={133-142}
}
• Published 23 September 2005
• Physics
• The Astronomical Journal
Deep X-ray surveys have resolved much of the X-ray background radiation below 2 keV into discrete sources, but the background above 8 keV remains largely unresolved. The obscured (type 2) active galactic nuclei (AGNs) that are expected to dominate the hard X-ray background have not yet been detected in sufficient numbers to account for the observed background flux. However, deep X-ray surveys have revealed large numbers of faint quiescent and starburst galaxies at moderate redshifts. In hopes…

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