Disk-Jet Connection in the Radio Galaxy 3C 120 (2009)
Chatterjee, Ritaban, Marscher, Alan P., Jorstad, Svetlana G., Olmstead, Alice R., McHardy, Ian M., Aller, Margo F., ...
We present the results of extensive multi-frequency monitoring of the radio galaxy 3C 120 between 2002 and 2007 at X-ray, optical, and radio wave bands, as well as imaging with the Very Long Baseline...
Multi-wavelength Variability of the Broad Line Radio Galaxy 3C 120 (2009)
Marshall, Kevin, Ryle, Wesley T., Miller, H. Richard, Marscher, Alan P., Jorstad, Svetlana G., Chicka, Benjamin, ...
We present results from a multi-year monitoring campaign of the broad-line radio galaxy 3C 120, using the Rossi X-ray Timing Explorer (RXTE) for nearly five years of observations. Additionally, we...
The inner jet of an active galactic nucleus as revealed by a radio-to-gamma-ray outburst (2008)
Marscher, Alan P., Jorstad, Svetlana G., D'Arcangelo, Francesca D., Smith, Paul S., Williams, G. Grant, Larionov, Valeri M., ...
Blazars are the most extreme active galactic nuclei. They possess oppositely directed plasma jets emanating at near light speeds from accreting supermassive black holes. According to theoretical...
Onken, Christopher A., Valluri, Monica, Peterson, Bradley M., Pogge, Richard W., Bentz, Misty C., Ferrarese, Laura, ...
We present a stellar dynamical estimate of the black hole (BH) mass in the Seyfert 1 galaxy, NGC 4151. We analyze ground-based spectroscopy as well as imaging data from the ground and space, and we...
Sokolov, Andrei, Marscher, Alan P., McHardy, Ian M.
We model rapid variability of multifrequency emission from blazars occurring across the electromagnetic spectrum (from radio to gamma-rays). Lower energy emission is produced by the synchrotron...
A brief review of long-term X-ray and optical variability in radio-quiet AGN (2004)
Uttley, Philip, McHardy, Ian M.
Long-time-scale X-ray and optical variability is a key characteristic of AGN. Here, we summarise our current understanding of the X-ray and optical continuum variability of radio-quiet AGN and the...
The nature of X-ray spectral variability in Seyfert Galaxies (2003)
Taylor, Richard D., Uttley, Philip, McHardy, Ian M.
We use a model-independent technique to investigate the nature of the 2-15 keV X-ray spectral variability in four Seyfert galaxies and distinguish between spectral pivoting and the two-component...
Correlated long-term optical and x-ray variations in NGC 5548 (2003)
Uttley, Philip, Edelson, Rick, McHardy, Ian M., Peterson, Bradley M., Markowitz, Alex
We combine the long-term optical light curve of the Seyfert 1 galaxy NGC 5548 with the X-ray light curve measured by the Rossi X-Ray Timing Explorer over 6 years, to determine the relationship...
Uttley, Philip, McHardy, Ian M.
Standard shot-noise models, which seek to explain the broadband noise variability that characterises the X-ray lightcurves of X-ray binaries and active galaxies, predict that the power spectrum of...