2017/08/21 by M. Gaug, Gaug, Markus, Daniel Garrido +1
Physics and Astronomy · #Crystallography and Radiation Phenomena #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Noncommutative and Quantum Gravity Theories #Quantum Mechanics and Applications
paper · pdf · doi:10.48550/arxiv.1708.06195
openalex publication_date 2017/08/21 · openalex created_date 2022/10/05 · openalex updated_date 2026/07/28
Fast variations of gamma-ray flux from Active Galactic Nuclei and Gamma-Ray\nBursts can constrain Lorentz Invariance Violation (LIV) because of the delayed\n(or advanced) arrival of photons with higher energies: this approach has lead\nto the current world-best limits on the energy scale of Quantum Gravity. Here\nwe report on constraints on LIV studying the gamma-ray emission up to TeV\nenergies from the Galactic Crab pulsar, recently discovered by the MAGIC\ncollaboration. A likelihood analysis of the pulsar events reconstructed for\nenergies above 400 GeV finds no significant variation of energy-dependent\narrival time, and 95% CL limits are then obtained on the effective LIV energy\nscale after taking into account systematic uncertainties. Only a factor of\nabout two less constraining than the current world-best limit on a quadratic\nLIV scenario, pulsars are now well established as a third and independent class\nof astrophysical objects suitable to constrain the characteristic energy scale\nof LIV.\n