Quantum-gravity analysis of gamma-ray bursts using wavelets

  title={Quantum-gravity analysis of gamma-ray bursts using wavelets},
  author={John Ellis and Nick E. Mavromatos and Dimitri V. Nanopoulos and Alexander S. Sakharov},
  journal={Astronomy and Astrophysics},
In some models of quantum gravity, space-time is thought to have a foamy structure with non-trivial optical prop- erties. We probe the possibility that photons propagating in vacuum may exhibit a non-trivial refractive index, by analyzing the times of flight of radiation from gamma-ray bursters (GRBs) with known redshifts. We use a wavelet shrinkage procedure for noise removal and a wavelet "zoom" technique to define with high accuracy the timings of sharp transitions in GRB light curves… 
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