id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
app01-2352	Guainazzi, Matteo	Cosmological Evolution of the Central Engine in High-Luminosity, High-Accretion Rate AGN	2014	6	.pdf	application/pdf	4233	156	56	Exceptions to this rules are '3% in large AGN X-ray spectroscopic surveys (Mateos et al. 2010), and can be easily explained by variability between non-simultaneous optical and X-ray observa- tions, X-ray obscuration by matter in the host galaxy, or even classification issues in poor-quality optical spec- tra. Sub-arc- second resolution imaging with Chandra, as well as the unprecedented XMM-Newton throughput have made possible a detailed characterisation of the high-energy Spectral Energy Distribution (SED) in large samples of AGN, covering a range in luminosity of almost ten orders of magnitudes, and cosmological distances well beyond the peak of the nuclear activity (Brandt & Hasinger 2005, Elvis et al. 2012, Pounds 2013).	cache/app01-2352.pdf	txt/app01-2352.txt