De_Angelis_Alessandro.pdf
De_Angelis_Alessandro.pdf De_Angelis_Alessandro.pdf
• z = 0.903 ± 0.003 • prompt spectrum detected, significant deviation from Band function at high E • High energy photon detected: 31 GeV at T o + 0.83 s [expected from Ellis & al. (12 ± 5) s] • tight constraint on Lorentz Invariance Violation: – E s1 = M QG > several M Planck • z = 1.8 ± 0.4 • one of the brightest GRBs observed by LAT • after prompt phase, power-low emission persists in the LAT data as late as 1 ks post trigger: highest E photon so far detected: 33.4 GeV, 82 s after GBM trigger [expected from Ellis & al. (26 ± 13) s] • much weaker constraints on LIV E s => Fermi rules, and 1 st order violations appear unlikely 73
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• z = 0.903 ± 0.003<br />
• prompt spectrum detected,<br />
significant deviation from Band<br />
function at high E<br />
• High energy photon detected:<br />
31 GeV at T o + 0.83 s<br />
[expected from Ellis & al. (12 ± 5) s]<br />
• tight constraint on Lorentz<br />
Invariance Violation:<br />
– E s1 = M QG > several M Planck<br />
• z = 1.8 ± 0.4<br />
• one of the brightest GRBs<br />
observed by LAT<br />
• after prompt phase, power-low<br />
emission persists in the LAT data as<br />
late as 1 ks post trigger:<br />
highest E photon so far detected:<br />
33.4 GeV, 82 s after GBM trigger<br />
[expected from Ellis & al. (26 ± 13) s]<br />
• much weaker constraints on LIV E s<br />
=> Fermi rules, and 1 st order violations appear unlikely<br />
73
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