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    Limits on energy dependence of the speed of light from a flare of the active galaxy PKS 2155-304

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    Date
    2008
    Author
    Aharonian, F.
    Büsching, I.
    De Jager, O.C.
    Holleran, M.
    Raubenheimer, B.C.
    Venter, C.
    H.E.S.S. Collaboration
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    Abstract
    In the past few decades, several models have predicted an energy dependence of the speed of light in the context of quantum gravity. For cosmological sources such as active galaxies, this minuscule effect can add up to measurable photon-energy dependent time lags. In this Letter a search for such time lags during the High Energy Stereoscopic System observations of the exceptional very high energy flare of the active galaxy PKS 2155-304 on 28 July 2006 is presented. Since no significant time lag is found, lower limits on the energy scale of speed of light modifications are derived
    URI
    http://hdl.handle.net/10394/3042
    https://doi.org/10.1103/PhysRevLett.101.170402
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    • Faculty of Natural and Agricultural Sciences [4855]

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