International audienceSome approaches to Quantum Gravity (QG) predict a modification of photon dispersion relations due to a breaking of Lorentz invariance. The effect is expected to affect photons near an effective QG energy scale. This scale has been constrained by observing gamma rays emitted from variable astrophysical sources such as gamma-ray bursts and flaring active galactic nuclei. Pulsars exhibit a periodic emission of possibly ms time scale. In 2014, the H.E.S.S. experiment reported the detection down to 20 GeV of gamma rays from the Vela pulsar having a periodicity of 89 ms. Using a likelihood analysis, calibrated with a dedicated Monte-Carlo procedure, we obtain the first limit on QG energy scale with the Vela pulsar. In this p...
We analyze the MeV/GeV emission from four bright gamma-ray bursts (GRBs) observed by the Fermi Large...
Lorentz violation (LV) is predicted by some quantum gravity theories, where photon dispersion relati...
24 pages, 9 figuresSeveral models of Quantum Gravity predict Lorentz Symmetry breaking at energy sca...
International audienceGamma-ray astronomy has become one of the main experimental ways to test the m...
Spontaneous breaking of Lorentz symmetry at energies on the order of the Planck energy or lower is p...
Some models for quantum gravity (QG) violate Lorentz invariance and predict an energy dependence of ...
Le cinquième télescope (CT5) du réseau H.E.S.S. (High Energy Stereoscopic System) a été inauguré en ...
Gamma-ray astronomy has become one of the main experimental ways to test the modified dispersion rel...
International audienceWe analyze the MeV/GeV emission from four bright gamma-ray bursts (GRBs) obser...
We analyze the MeV/GeV emission from four bright gamma-ray bursts (GRBs) observed by the Fermi Large...
Lorentz violation (LV) is predicted by some quantum gravity theories, where photon dispersion relati...
24 pages, 9 figuresSeveral models of Quantum Gravity predict Lorentz Symmetry breaking at energy sca...
International audienceGamma-ray astronomy has become one of the main experimental ways to test the m...
Spontaneous breaking of Lorentz symmetry at energies on the order of the Planck energy or lower is p...
Some models for quantum gravity (QG) violate Lorentz invariance and predict an energy dependence of ...
Le cinquième télescope (CT5) du réseau H.E.S.S. (High Energy Stereoscopic System) a été inauguré en ...
Gamma-ray astronomy has become one of the main experimental ways to test the modified dispersion rel...
International audienceWe analyze the MeV/GeV emission from four bright gamma-ray bursts (GRBs) obser...
We analyze the MeV/GeV emission from four bright gamma-ray bursts (GRBs) observed by the Fermi Large...
Lorentz violation (LV) is predicted by some quantum gravity theories, where photon dispersion relati...
24 pages, 9 figuresSeveral models of Quantum Gravity predict Lorentz Symmetry breaking at energy sca...