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Search for Lorentz invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken on MJD 53944

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dc.contributor.author Venter, Christo
dc.contributor.author Vorster, Michael Johannes
dc.contributor.author Büsching, Ingo
dc.contributor.author De Jager, Ocker Cornelis
dc.date.accessioned 2012-09-05T15:15:13Z
dc.date.available 2012-09-05T15:15:13Z
dc.date.issued 2011
dc.identifier.citation Busching, I. et al. 2011. Search for Lorentz invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken on MJD 53944. Astroparticle physics, 34(9):738-747. [http://www.journals.elsevier.com/astroparticle-physics] en_US
dc.identifier.issn 0927-6505
dc.identifier.issn 1873-2852 (Online)
dc.identifier.uri http://hdl.handle.net/10394/7244
dc.description.abstract Several models of Quantum Gravity predict Lorentz Symmetry breaking at energy scales approaching the Planck scale (∼1019 GeV). With present photon data from the observations of distant astrophysical sources, it is possible to constrain the Lorentz Symmetry breaking linear term in the standard photon dispersion relations. Gamma Ray Bursts (GRB) and flaring Active Galactic Nuclei (AGN) are complementary to each other for this purpose, since they are observed at different distances in different energy ranges and with different levels of variability. Following a previous publication of the High Energy Stereoscopic System (H.E.S.S.) collaboration [1], a more sensitive event-by-event method consisting of a likelihood fit is applied to PKS 2155-304 flare data of MJD 53944 (July 28, 2006) as used in the previous publication. The previous limit on the linear term is improved by a factor of ∼3 up to GeV and is currently the best result obtained with blazars. The sensitivity to the quadratic term is lower and provides a limit of 6.4 × 1010 GeV, which is the best value obtained so far with an AGN and similar to the best limits obtained with GRB. en_US
dc.description.uri http://dx.doi.org/10.1016/j.astropartphys.2011.01.007
dc.description.uri http://ac.els-cdn.com/S0927650511000090/1-s2.0-S0927650511000090-main.pdf?_tid=ce6d887c-f743-11e1-b07e-00000aab0f26&acdnat=1346840820_2b2d2e38cd225c9e1b79ea326748ca8b
dc.language.iso en en_US
dc.publisher Elsevier Science en_US
dc.subject Active galaxies en_US
dc.subject PKS 2155-304 en_US
dc.subject H.E.S.S. en_US
dc.subject quantum gravity en_US
dc.subject Lorentz invariance breaking en_US
dc.title Search for Lorentz invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken on MJD 53944 en_US
dc.type Article en_US


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