3 papers
astro-ph2001
The Chandra High Resolution Spectra of Mkn 421
F. Nicastro, A. Fruscione, M. Elvis +3
Mkn 421 was observed by Chandra twice, on November 5, 1999 as part of the Chandra calibration program, with the ACIS-HETG configuration, and on May 29, 2000 following our Target Of…
astro-ph1998
The High Energy Resolution View of Ionized Absorbers in AGN
F. Nicastro, F. Fiore, G. Matt
A number of emission and absorption features are expected to be visible in high energy resolution X-ray spectra of type 1 AGN with ionized gas along the line of sight (so called "w…
astro-ph1998
Signatures of Resonant Absoprtion in X-ray Spectra of Type 1 AGN
F. Nicastro, F. Fiore, G. Matt
We present photoionization models accounting for both photoelectric and resonant absorption. We demonstrate that resonance absorption lines are detectable even in moderate resoluti…