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Variable X-ray absorption in the mini-broad absorption line quasar PG 1126-041
Margherita Giustini, Massimo Cappi, George Chartas +7
We present the results of a multi-epoch observational campaign on the mini-broad absorption line quasar (mini-BAL QSO) PG 1126-041 performed with XMM-Newton from 2004 to 2009. Time…
Evidence for ultra-fast outflows in radio-quiet AGNs: II - detailed photo-ionization modeling of Fe K-shell absorption lines
F. Tombesi, M. Cappi, J. N. Reeves +3
X-ray absorption line spectroscopy has recently shown evidence for previously unknown Ultra-fast Outflows (UFOs) in radio-quiet AGNs. In the previous paper of this series we define…
Probing the unified model in NGC 7314
J. Ebrero, E. Costantini, J. S. Kaastra +2
We present a study of the complex absorbed X-ray spectrum of the Narrow Line Seyfert 1 galaxy NGC 7314. We collected available public X-ray data from the archives of XMM-Newton, Su…
Variable X-ray absorption in the mini-BAL QSO PG 1126-041
Margherita Giustini, Massimo Cappi, George Chartas +7
X-ray studies of active galactic nuclei (AGN) with powerful nuclear winds are important for constraining the physics of the inner accretion/ejection flow around supermassive black…
PG 1211+143: probing high frequency lags in a high mass AGN
B. De Marco, G. Ponti, P. Uttley +4
We present the timing analysis of the four archived XMM-Newton observations of PG 1211+143. The source is well-known for its spectral complexity, comprising a strong soft-excess an…
Extreme Warm Absorber variability in the Seyfert Galaxy Mrk 704
Giorgio Matt, Stefano Bianchi, Matteo Guainazzi +8
In about half of Seyfert galaxies, the X-ray emission is absorbed by an optically thin, ionized medium, the so-called "Warm Absorber", whose origin and location is still a matter o…