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|Title:||Limits on an energy dependence of the speed of light from a flare of the active galaxy PKS 2155-304|
Barres de Almaida, U.
|Citation:||Physical Review Letters, 2008; 101(17):170402-1-170402-5|
|Publisher:||American Physical Soc|
|F. Aharonian...G. Rowell...and A. Zech...et al.(H.E.S.S. Collaboration)|
|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 paper a search for such time lags during the H.E.S.S. observations of the exceptional very high energy flare of the active galaxy PKS 2155-304 on 28 July in 2006 is presented. Since no significant time lag is found, lower limits on the energy scale of speed of light modifications are derived.|
|Rights:||©2008 American Physical Society|
|Appears in Collections:||Physics publications|
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