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- W2067442253 abstract "We constrain the possibility of a non-trivial refractive index in free space corresponding to an energy-dependent velocity of light: c(E) ≃ c0(1 − E/M), where M is a mass scale that might represent effect of quantum-gravitational space-time foam, using the arrival times of sharp features observed in the intensities of radiation with different energies from a large sample of gamma-ray bursters (GRBs) with known redshifts. We use wavelet techniques to identify genuine features, which we confirm in simulations with artificial added noise. Using the weighted averages of the time-lags calculated using correlated features in all the GRB light curves, we find a systematic tendency for more energetic photons to arrive earlier. However, there is a very strong correlation between the parameters characterizing an intrinsic time-lag at the source and a distance-dependent propagation effect. Moreover, the significance of the earlier arrival times is less evident for a subsample of more robust spectral structures. Allowing for intrinsic stochastic time-lags in these features, we establish a statistically robust lower limit: M > 0.9 × 1016 GeV on the scale of violation of Lorentz invariance." @default.
- W2067442253 created "2016-06-24" @default.
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- W2067442253 date "2006-07-01" @default.
- W2067442253 modified "2023-10-15" @default.
- W2067442253 title "Robust limits on Lorentz violation from gamma-ray bursts" @default.
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- W2067442253 doi "https://doi.org/10.1016/j.astropartphys.2006.04.001" @default.
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