Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-10-04
Astron.Astrophys.402:409-424,2003
Astronomy and Astrophysics
Astrophysics
This version is accepted for publication in Astronomy & Astrophysics. The discussion and introduction are extended making clea
Scientific paper
10.1051/0004-6361:20030263
In some models of quantum gravity, space-time is thought to have a foamy structure with non-trivial optical properties. We probe the possibility that photons propagating in vacuum may exhibit a non-trivial refractive index, by analyzing the times of flight of radiation from gamma-ray bursters (GRBs) with known redshifts. We use a wavelet shrinkage procedure for noise removal and a wavelet `zoom' technique to define with high accuracy the timings of sharp transitions in GRB light curves, thereby optimizing the sensitivity of experimental probes of any energy dependence of the velocity of light. We apply these wavelet techniques to 64 ms and TTE data from BATSE, and also to OSSE data. A search for time lags between sharp transients in GRB light curves in different energy bands yields the lower limit $M \ge 6.9 \cdot 10^{15}$ GeV on the quantum-gravity scale in any model with a linear dependence of the velocity of light $~ E/M$. We also present a limit on any quadratic dependence.
Ellis John
Mavromatos Nick E.
Nanopoulos Dimitri V.
Sakharov Alexander S.
No associations
LandOfFree
Quantum-Gravity Analysis of Gamma-Ray Bursts using Wavelets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum-Gravity Analysis of Gamma-Ray Bursts using Wavelets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum-Gravity Analysis of Gamma-Ray Bursts using Wavelets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-238123