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Limits to Quantum Gravity Effects from Observations of TeV Flares in Active Galaxies

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arxiv gr-qc/9810044 v1 pith:FPUSEADH submitted 1998-10-13 gr-qc astro-phhep-phhep-th

Limits to Quantum Gravity Effects from Observations of TeV Flares in Active Galaxies

S.D. Biller , A.C. Breslin , J. Buckley , M. Catanese , M. Carson , D.A. Carter-Lewis , M.F. Cawley , D.J. Fegan
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J. Finley J.A. Gaidos A.M. Hillas F. Krennrich R.C. Lamb R. Lessard C. Masterson J.E. McEnery B. McKernan P. Moriarty J. Quinn H.J. Rose F. Samuelson G. Sembroski P. Skelton T.C. Weekes
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We have used data from the TeV gamma-ray flare associated with the active galaxy Markarian 421 observed on 15 May 1996 to place bounds on the possible energy-dependence of the speed of light in the context of an effective quantum gravitational energy scale. The possibility of an observable time dispersion in high energy radiation has recently received attention in the literature, with some suggestions that the relevant energy scale could be less than the Planck mass and perhaps as low as 10^16 GeV. The limits derived here indicate this energy scale to be in excess of 4x10^16 GeV at the 95% confidence level. To the best of our knowledge, this constitutes the first convincing limit on such phenomena in this energy regime.

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  1. The Confrontation between General Relativity and Experiment

    gr-qc 2014-03 accept novelty 2.0

    Experiments confirm general relativity to high precision in weak-field and strong-field regimes, with gravitational wave damping matching predictions to better than 0.5 percent.