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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F11%3A10104678%21RIV12-GA0-11320___
rdf:type
skos:Concept n9:Vysledek
dcterms:description
Several models of Quantum Gravity predict Lorentz Symmetry breaking at energy scales approaching the Planck scale (similar to 10(19) 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 similar to 3 up to M(QG)(1), } 2.1 X 10(1B) GeV and is currently the best result obtained with blazars. The sensitivity to the quadratic term is lower and provides a limit of M(QG)(q) } 6.4 x 10(10) GeV, which is the best value obtained so far with an AGN and similar to the best limits obtained with GRB. (C) 2011 Elsevier B.V. All rights reserved. Several models of Quantum Gravity predict Lorentz Symmetry breaking at energy scales approaching the Planck scale (similar to 10(19) 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 similar to 3 up to M(QG)(1), } 2.1 X 10(1B) GeV and is currently the best result obtained with blazars. The sensitivity to the quadratic term is lower and provides a limit of M(QG)(q) } 6.4 x 10(10) GeV, which is the best value obtained so far with an AGN and similar to the best limits obtained with GRB. (C) 2011 Elsevier B.V. All rights reserved.
dcterms:title
Search for Lorentz Invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken on MJD 53944 Search for Lorentz Invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken on MJD 53944
skos:prefLabel
Search for Lorentz Invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken on MJD 53944 Search for Lorentz Invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken on MJD 53944
skos:notation
RIV/00216208:11320/11:10104678!RIV12-GA0-11320___
n9:predkladatel
n10:orjk%3A11320
n3:aktivita
n15:Z n15:P
n3:aktivity
P(GPP203/11/P363), P(LC527), Z(MSM0021620859)
n3:cisloPeriodika
9
n3:dodaniDat
n13:2012
n3:domaciTvurceVysledku
n19:6144063 n19:9283439
n3:druhVysledku
n5:J
n3:duvernostUdaju
n11:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
228419
n3:idVysledku
RIV/00216208:11320/11:10104678
n3:jazykVysledku
n20:eng
n3:klicovaSlova
LIMITS; PHOTONS; REDSHIFT; DISPERSION; QUANTUM-GRAVITY; GAMMA-RAY BURSTS
n3:klicoveSlovo
n7:QUANTUM-GRAVITY n7:LIMITS n7:GAMMA-RAY%20BURSTS n7:PHOTONS n7:DISPERSION n7:REDSHIFT
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[FB8368732CA4]
n3:nazevZdroje
Astroparticle Physics
n3:obor
n17:BF
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
180
n3:projekt
n8:LC527 n8:GPP203%2F11%2FP363
n3:rokUplatneniVysledku
n13:2011
n3:svazekPeriodika
34
n3:tvurceVysledku
Abramowski, A. Nedbal, Dalibor Rob, Ladislav Aharonian, F. Acero, F.
n3:wos
000289329100010
n3:zamer
n21:MSM0021620859
s:issn
0927-6505
s:numberOfPages
10
n16:doi
10.1016/j.astropartphys.2011.01.007
n18:organizacniJednotka
11320