4 papers
Using Multiwavelength Observations to Estimate the Black Hole Masses and Accretion Rates in Seyfert Galaxies
James Chiang, Omer Blaes
We model the spectral energy distribution of the type 1 Seyfert galaxies, fitting data from simultaneous optical, UV, and X-ray monitoring observations. We assume a geometry consis…
Correlated Spectral and Temporal Variability in the High-Energy Emission from Blazars
C. D. Dermer, H. Li, J. Chiang
Blazar flare data show energy-dependent lags and correlated variability between optical/X-ray and GeV-TeV energies, and follow characteristic trajectories when plotted in the spect…
Variability and Unification of Blazars and Gamma Ray Bursts
Charles D. Dermer, James Chiang
Most models for blazars and gamma-ray bursts involve relativistic plasma outflows powered by accretion processes onto black holes. The blast wave physics developed for cosmological…
Decelerating Plasmoid Model for Gamma-Ray Burst Afterglows
James Chiang, Charles D. Dermer
The flaring and fading radio, optical, and X-ray afterglows from GRB 970508 are modeled by a highly relativistic plasma sphere which decelerates by sweeping up ambient gas. The aft…