Research Article

General Relativity and Gravitation

, Volume 40, Issue 8, pp 1731-1743

First online:

Study of Lorentz violation in INTEGRAL gamma-ray bursts

  • Raphael LamonAffiliated withInstitut für Theoretische Physik, Universität Ulm Email author 
  • , Nicolas ProduitAffiliated withINTEGRAL Science Data Center
  • , Frank SteinerAffiliated withInstitut für Theoretische Physik, Universität Ulm

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We search for possible time lags caused by quantum gravitational effects using gamma-ray bursts (GRBs) detected by INTEGRAL. The advantage of this satellite is that we have at our disposal the energy and arrival time of every detected single photon, which enhances the precision of the time resolution. We present a new method for seeking time lags in unbinned data using a maximum likelihood method and support our conclusions with Monte Carlo simulations. The analysis establishes a conservative lower bound on the Lorentz invariance violation scale, which is several orders of magnitude below the Planck mass, whose value may however increase if better statistics of GRBs were available. Furthermore, we disagree with previous studies in which a non-monotonic function of the redshift was used to perform a linear fit.


Lorentz violation Quantum gravity Gamma-ray bursts