Probing Lorentz Invariance with a VHE flare of PKS 2155-304 in July 2006

Details Probing Lorentz Invariance with a VHE flare of PKS 2155-304 in July 2006 Probing Lorentz Invariance with a VHE flare of PKS 2155-304 in July 2006

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1085..419b&link_type=abstract

HIGH ENERGY GAMMA-RAY ASTRONOMY: Proceedings of the 4th International Meeting on High Energy Gamma-Ray Astronomy. AIP Conferenc

Astronomy and Astrophysics

Astronomy

Gamma-Ray, Quantum Gravity, Astronomical And Space-Research Instrumentation

Scientific paper

Several Quantum Gravity models predict small differences in the speed light between photons of different energies, leading to deviations from Lorentz Symmetry. This minute effect was predicted to add up to measurable time lags for photons which traveled cosmological distances. Here we present the search for such time lags during the H.E.S.S. observations of the exceptional VHE flares of the active galaxy PKS 2155-304 in July 2006. Since no time lag is found, we derive a lower limit on the energy scale on which Lorentz violations can occur.

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