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- W2700951 abstract "The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope provides tremendous advances for studying the high-energy diffuse gamma-ray emission at energies between 100 MeV and >300 GeV. Its large field-of-view of 2.4 sr and its effective area of up to 0.8 m, combined with a sky-survey observation strategy, allow for an almost uniform exposure of the whole sky with unprecedented statistics. The diffuse emission observed by the Fermi LAT is a superposition of several components. A highly structured Galactic component arising from the interactions of cosmic rays with the interstellar gas and radiation is dominant at low Galactic latitudes. The target of this study is an additional isotropic component which is considered to be of extragalactic origin. Other contributions include solar system sources including the gamma-ray albedo of the Earth, charged cosmic rays mis-classified as gamma-rays and stray photons from detected point sources. Here we present an analysis of the intensity of the extragalactic diffuse gamma-ray emission observed by the LAT, based on careful modeling and subtraction of the detected LAT point sources and the mentioned foregrounds. The obtained spectrum and a comparison to results derived from EGRET observations of the isotropic diffuse gamma-ray emission will be presented at the conference." @default.
- W2700951 created "2016-06-24" @default.
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- W2700951 date "2009-07-01" @default.
- W2700951 modified "2023-09-26" @default.
- W2700951 title "Observation of the extragalactic diffuse continuum gamma-ray emission with Fermi LAT" @default.
- W2700951 hasPublicationYear "2009" @default.
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