Unfolding spectral analysis of the Fermi-LAT data

Details Unfolding spectral analysis of the Fermi-LAT data Unfolding spectral analysis of the Fermi-LAT data

2009-12-18

arxiv.org/abs/0912.3695v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

6 pages, 9 figures

Scientific paper

The Large Area Telescope (LAT) onboard the Fermi satellite is observing the gamma-ray sky in the high energy region, above 20 MeV. We have developed a method to reconstruct the energy spectra of the gamma-rays detected by the Fermi LAT instrument based on a Bayesian unfolding approach, that takes into account the energy dispersion introduced by the instrument response. The method has been successfully applied to reconstruct the energy spectra of both steady and pulsating point sources. The analysis technique will be illustrated and the results obtained in some significant test cases will be discussed.

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