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Neutrinos from Gamma Ray Bursts
Karl Mannheim
The observed fluxes of cosmic rays and gamma rays are used to infer the maximum allowed high-energy neutrino flux allowed for Gamma Ray Bursts (GRBs), following Mannheim, Protheroe…
Constraints on Particle Acceleration from the Diffuse Isotropic Gamma-Ray Background
Karl Mannheim
Gamma rays trace accelerated particles, and the observed flux of extragalactic gamma rays therefore constrains the global efficiency for particle acceleration. Extragalactic jets i…
Implications of a possible 23 day periodicity for binary black hole models in Mkn~501
F. M. Rieger, K. Mannheim
We investigate the implications of a massive binary system in the centre of the gamma-ray blazar Mkn~501 and show that the periodical behaviour recently observed in the TeV and X-r…
Magnetic field strength from peaked synchrotron spectra
Christian Hettlage, Karl Mannheim
Key diagnostics of non-thermal plasmas, such as the position of the synchrotron self-absorption turnover or the Faraday rotation optical depth, depend crucially on the unobserved l…