36 citations · 72 across the 8 of their papers we have counts for
8 papers · 1 filter
How Polarization and Scattering can reveal Geometries, Dynamics, and Feeding of Active Galactic Nuclei
R. W. Goosmann, C. M. Gaskell, M. Shoji
Gaskell et al. (2007) introduced polarization reverberation mapping as a new technique to explore the structure of active galactic nuclei. We present modeling results for the time-…
NGC 5548: The AGN Energy Budget Problem and the Geometry of the Broad-Line Region and Torus
C. Martin Gaskell, Elizabeth S. Klimek, Ludmila S. Nazarova
We consider in detail the spectral energy distribution (SED) and multi-wavelength variability of NGC5548. Comparison with the SEDs of other AGNs implies that the internal reddening…
AGN Reddening and Ultraviolet Extinction Curves from Hubble Space Telescope Spectra
C. Martin Gaskell, A. J. Benker
We present intrinsic extinction curves for 14 AGNs. The AGNs have reddenings, E(B-V), of up to 0.36 mag. The majority (13 out of 14) of the extinction curves are not steep in the U…
Modeling the Polarization of Dusty Scattering Cones in Active Galactic Nuclei
Rene W. Goosmann, C. Martin Gaskell, M. Shoji
We have used the STOKES radiative transfer code, to model polarization induced by dust scattering in the polar regions of Active Galactic Nuclei (AGN). We discuss the wavelength-de…
Optical and X-ray Variability of AGNs
C. Martin Gaskell
I present new comparisons of AGN optical, UV, and X-ray variations. These reveal complex relationships between the different passbands that can change with time in a given object.…
Optical Variability of the Three Brightest Nearby Quasars
C. Martin Gaskell, Andrew J. Benker, Jeffrey S. Campbell +9
We report on the relative optical variability of the three brightest nearby quasars, 3C 273, PDS 456, and PHL 1811. All three have comparable absolute magnitudes, but PDS 456 and P…