230 citations · 853 across the 30 of their papers we have counts for
5 papers · 1 filter
Erratum (astro-ph/0510172): Robust Limits on Lorentz Violation from Gamma-Ray Bursts
John Ellis, N. E. Mavromatos, D. V. Nanopoulos +2
We correct the fitting formula used in refs. [1,2] to obtain a robust limit on a violation of Lorentz invariance that depends linearly on the photon energy. The correction leads to…
Probing quantum gravity using photons from a flare of the active galactic nucleus Markarian 501 observed by the MAGIC telescope
J. Albert et al., John Ellis, N. E. Mavromatos +3
We analyze the timing of photons observed by the MAGIC telescope during a flare of the active galactic nucleus Mkn 501 for a possible correlation with energy, as suggested by some…
Synchrotron Radiation and Quantum Gravity
John Ellis, N. E. Mavromatos, D. V. Nanopoulos +1
Photons may evade a synchrotron radiation constraint on quantum gravity by violating the equivalence principle.
Synchrotron Radiation from the Crab Nebula Discriminates between Models of Space-Time Foam
J. Ellis, N. E. Mavromatos, A. S. Sakharov
It has been argued by Jacobson, Liberati and Mattingly that synchrotron radiation from the Crab Nebula imposes a stringent constraint on any modification of the dispersion relation…
Sensitivity of Astrophysical Observations to Gravity-Induced Wave Dispersion in Vacuo
G. Amelino-Camelia, John Ellis, N. E. Mavromatos +2
We discuss possible signatures of quantum gravity for the propagation of light, including an energy-dependent velocity (refractive index), dispersion in velocity at a given energy,…