Bounds on Lorentz invariance violation from MAGIC observation of GRB 190114C
Phys. Rev. Lett. 125, 021301, 2020
External url: https://doi.org/10.1103/PhysRevLett.125.021301
On January 14, 2019, the Major Atmospheric Gamma Imaging Cherenkov telescopes detected GRB 190114C above 0.2 TeV, recording the most energetic photons ever observed from a gamma-ray burst. We use this unique observation to probe an energy dependence of the speed of light in vacuo for photons as predicted by several quantum gravity models. Based on a set of assumptions on the possible intrinsic spectral and temporal evolution, we obtain competitive lower limits on the quadratic leading order of speed of light modification.