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- W37893399 abstract "A powerful tool to investigate the structure, composition and distance form the central source of the circumnuclear absorber in AGNs is the study of column density variability through time-resolved X-ray spectroscopy. I show recent results on this field, which revealed significant NH variations in time scales as short as few hours, implying an extremely compact (on the scale of the Broad Line Region) and clumpy absorber. The key limitation for these studies is the degeneracy in spectral fitting between variations in continuum slope and in NH , which can be removed only in few very high S/N cases in 110 keV spectra. Adding a high energy, high S/N spectrum would allow to perform this kind of analysis on a large sample of obscured sources, and to add important new elements to our understanding of the central region of AGNs." @default.
- W37893399 created "2016-06-24" @default.
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- W37893399 date "2008-01-01" @default.
- W37893399 modified "2023-10-16" @default.
- W37893399 title "Hard X-ray spectroscopy of obscured AGNs ." @default.
- W37893399 hasPublicationYear "2008" @default.
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