GLAST and GRBs: Probing Photon Propagation over cosmological distances

Journal Article · Fri May 19 00:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2207979· OSTI ID:20798706

Longo, Francesco ^[1]; Omodei, Nicola ^[2]; Cohen-Tanugi, Johann ^[3]; Scargle, Jeff D ^[4]; Piron, Frederic ^[5]

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1. Department of Physics, University of Trieste (Italy)
2. INFN, Section of Pisa (Italy)
3. SLAC-Stanford University (United States)
4. NASA Ames Research Center (United States)
5. Groupe d'Astroparticules de Montpellier (France)

Especially in the framework of Quantum Gravity, it is theoretically possible that photons of different energy propagate at different velocity. Gamma-ray Bursts (GRBs), due to their large distances and rapid variability in a broad energy band, are perhaps the best astronomical sources in which to measure any such dispersion over cosmological distances. GLAST will detect several GRBs per year at GeV energies, where the effect may be detectable. We address problems of optimal sensitivity and discrimination against energy-dependent effects intrinsic to GRB emission, using simulated data and new unbinned lag-detection algorithms.

• OSTI ID: 20798706
• Journal Information: AIP Conference Proceedings, Vol. 836, Issue 1; Conference: 16. Maryland astrophysics conference, Washington, DC (United States), 29 Nov - 2 Dec 2005; Other Information: DOI: 10.1063/1.2207979; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALGORITHMS
COSMIC GAMMA BURSTS
COSMIC GAMMA SOURCES
COSMIC PHOTONS
COSMIC RAY DETECTION
COSMOLOGY
DISTANCE
EMISSION
ENERGY DEPENDENCE
GAMMA DETECTION
GEV RANGE
QUANTUM GRAVITY
SENSITIVITY
TELESCOPE COUNTERS