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On Gamma Ray Burst and Blazar AGN Origins of the Ultra-High Energy Cosmic Rays in Light of First Results from Auger
Charles D. Dermer
The discoveries of the GZK cutoff with the HiRes and Auger Observatories and the discovery by Auger of clustering of >~60 EeV ultra-high energy cosmic rays (UHECRs) towards nearby…
White Paper on the Status and Future of Ground-based Gamma-ray Astronomy
H. Krawczynski, J. Buckley, K. Byrum +8
In recent years, ground-based gamma-ray observatories have made a number of important astrophysical discoveries which have attracted the attention of the wider scientific community…
The Extragalactic Gamma Ray Background
Charles D. Dermer
One way to understand the nonthermal history of the universe is by establishing the origins of the unresolved and truly diffuse extragalactic gamma rays. Dim blazars and radio/gamm…
Gamma Ray Bursts in the Swift and GLAST Era
Truong Le, Charles D. Dermer
We summarize our model for long-duration gamma ray bursts (GRBs) that fits the redshift (z) distributions measured with Swift and missions before Swift, and the pre-Swift GRB jet o…
Nonthermal Synchrotron Radiation from Gamma Ray Burst External Shocks and the X-ray Flares Observed with Swift
Charles D. Dermer
An analysis of the interaction between a spherical relativistic blast-wave shell and a stationary cloud with a spherical cap geometry is performed assuming that the cloud width <<…
Correlation of Photon and Neutrino Fluxes in Blazars and Gamma Ray Bursts
C. Dermer, E. Ramirez-Ruiz, T. Le
Relativistic black-hole jet sources are leading candidates for high energy (>> TeV) neutrino production. The relations defining (a) efficient photopion losses of cosmic-ray protons…