A new method to study energy-dependent arrival delays on photons from astrophysical sources

Details A new method to study energy-dependent arrival delays on photons from astrophysical sources A new method to study energy-dependent arrival delays on photons from astrophysical sources

2008-03-14

arxiv.org/abs/0803.2120v3

Astropart.Phys.31:226-232,2009

Astronomy and Astrophysics

Astrophysics

18 pages, 7 figures

Scientific paper

10.1016/j.astropartphys.2009.01.

Correlations between the arrival time and the energy of photons emitted in outbursts of astrophysical objects are predicted in quantum and classical gravity scenarios and can appear as well as a result of complex acceleration mechanisms responsible for the photon emission at the source. This paper presents a robust method to study such correlations that overcomes some limitations encountered in previous analysis, and is based on a Likelihood function built from the physical picture assumed for the emission, propagation and detection of the photons. The results of the application of this method to a flare of Markarian 501 observed by the MAGIC telescope are presented. The method is also applied to a simulated dataset based on the flare of PKS 2155-304 recorded by the H.E.S.S. observatory to proof its applicability to complex photon arrival time distributions.

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