Search for Lorentz Invariance Violation effects with PKS 2155-304 flaring period in 2006 by H.E.S.S

Understand

Highly energetic, variable and distant sources such as Active Galactic Nuclei provide a good opportunity to evaluate effects due to the emission and the propagation of high energy photons.

• In this note, a study of possible energy-dependent time-lags with PKS 2155-304 light curve as measured by H.E.S.S.
• in July 2006 is presented.
• These time-lags could either come from the emission processes or also sign a Lorentz Symmetry breaking as predicted in some Quantum Gravity models.