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27 April 2024

» arxiv » astro-ph/0003265

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Gamma-ray Observations of the Galactic Plane at Energies E > 500 GeV
S.LeBohec ; I.H.Bond ; S.M.Bradbury ; J.H.Buckley ; A.M.Burdett ; D.A.Carter-Lewis ; M.Catanese ; M.F.Cawley ; S.Dunlea ; M. D’Vali ; D.J.Fegan ; S.J.Fegan ; J.P.Finley ; J.A.Gaidos ; T.A.Hall ; A.M.Hillas ; D.Horan ; J.Knapp ; F.Krennrich ; R.W.Lessard ; D. Macomb ; C.Masterson ; J.Quinn ; H.J.Rose ; F.W.Samuelson ; G.H.Sembroski ; V.V.Vassiliev ; T.C.Weekes ;
Date:	17 Mar 2000
Journal:	Astrophys.J. 539 (2000) 209-215
Subject:	astro-ph
Abstract:	In 1998 and 1999 the Whipple Observatory 10 m telescope was used to search for diffuse gamma ray emission from the Galactic Plane. No signifiant evidence of emission was found. Assuming the TeV emission profile matches EGRET observations above 1 GeV with a differential spectral index of 2.4, we derive an upper limit of {$ m {3.0cdot10^{-8}cm^{-2}s^{-1}sr^{-1}}$} for the average diffuse emission above {{$ m500 GeV$}} in the galactic latitude range from {{$ m-2^o$ to $ m +2^o$}} at galactic longitude {{$ m 40^o$}}. Comparisons with EGRET observations provide a lower limit of 2.31 for the differential spectral index of the diffuse emission, assuming there is no break in the spectrum between 30 GeV and 500 GeV. This constrains models for diffuse emission with a significant inverse Compton contribution.
Source:	arXiv, astro-ph/0003265
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