328 citations · 1.9k across the 31 of their papers we have counts for
6 papers · 1 filter
Chandra-LETGS observation of Mrk 279: modeling the AGN internal structure
E. Costantini, J. S. Kaastra, K. C. Steenbrugge +3
We present the Chandra-LETGS analysis of Mrk 279, a bright Seyfert 1 galaxy. The spectrum shows a variety of features arising from different physical environments in the vicinity o…
X-ray/UV Campaign on the Mrk 279 AGN Outflow: Constraining Inhomogeneous Absorber Models
Nahum Arav, Jelle Kaastra, Gerard A. Kriss +3
We investigate the applicability of inhomogeneous absorber models in the formation of AGN outflow absorption-troughs. The models we explore are limited to monotonic gradients of ab…
X-ray/UV campaign on the Mrk 279 outflow: density diagnostics in Active Galactic Nuclei using O V K-shell absorption lines
J. S. Kaastra, A. J. J. Raassen, R. Mewe +6
One of the main problems in modeling the ionised outflows in Active Galactic Nuclei is the unknown distance of the outflowing wind to the central source. Only if the density is kno…
Constraints on Intrinsic UV Absorption in NGC 3783
Jack R. Gabel, Steven B. Kraemer, D. Michael Crenshaw
Results from an analysis of the intrinsic UV absorption in the Seyfert 1 galaxy NGC 3783 are presented. We focus on two new results that demonstrate techniques for deriving importa…
High-Resolution Ultraviolet Spectra of the Dwarf Seyfert 1 Galaxy NGC 4395: Evidence for Intrinsic Absorption
D. M. Crenshaw, S. B. Kraemer, J. R. Gabel +5
We present ultraviolet spectra of the dwarf Seyfert 1 nucleus of NGC 4395, obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) and the Hubble Space Telescope's Space Te…
On the Relationship Between the Optical Emission-Line and X-ray Luminosities in Seyfert 1 Galaxies
S. B. Kraemer, I. M. George, D. M. Crenshaw +1
We have explored the relationship between the [O III] 5007 and the 2--10 keV luminosities for a sample of Broad- and Narrow-Line Seyfert 1 galaxies (BLSy1 and NLSy1, respectivel…