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Spectrum of the Iso...
Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived from First-Year Fermi Large Area Telescope Data
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Abdo, A. A. (author)
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Ackermann, M. (author)
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Ajello, M. (author)
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Atwood, W. B. (author)
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Johannesson, G. (author)
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- Sellerholm, Alexander (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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- Ryde, Felix (author)
- KTH,Partikel- och astropartikelfysik
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Ziegler, M. (author)
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- Conrad, Jan (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Royal Swedish Academy of Sciences, Sweden
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- Meruer, C. (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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(creator_code:org_t)
- 2010
- 2010
- English.
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In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 104:10
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- We report on the first Fermi Large Area Telescope (LAT) measurements of the so-called "extra-galactic" diffuse gamma-ray emission (EGB). This component of the diffuse gamma-ray emission is generally considered to have an isotropic or nearly isotropic distribution on the sky with diverse contributions discussed in the literature. The derivation of the EGB is based on detailed modeling of the bright foreground diffuse Galactic gamma-ray emission, the detected LAT sources, and the solar gamma-ray emission. We find the spectrum of the EGB is consistent with a power law with a differential spectral index gamma = 2.41 +/- 0.05 and intensity I(>100 MeV) = (1.03 +/- 0.17) x 10(-5) cm(-2) s(-1) sr(-1), where the error is systematics dominated. Our EGB spectrum is featureless, less intense, and softer than that derived from EGRET data.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- inverse compton-scattering
- egret data
- solar
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Abdo, A. A.
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Ackermann, M.
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Ajello, M.
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Atwood, W. B.
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Johannesson, G.
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Sellerholm, Alex ...
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show more...
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Ryde, Felix
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Ziegler, M.
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Conrad, Jan
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Meruer, C.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Physical Review ...
- By the university
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Royal Institute of Technology
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Stockholm University