Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Spectrum of 1ES0229 + 200 and the Cosmic Infrared Background   We examine the effect of gamma-ray absorption by the extragalactic infrared
radiation on intrinsic spectra predicted for 1ES0229+200 and compare our
results with the observational data. We find agreement with our previous
results on the shape of the IR spectral energy distribution (SED), contrary to
the recent assertion of the HESS group. Our analysis indicates that 1ES0229+200
has a very hard intrinsic spectrum with a spectral index between 1.1 +/- 0.3
and 1.5 +/- 0.3 in the energy range between ~0.5 TeV and ~15 TeV. Under the
assumptions that (1) the SED models of Stecker, Malkan & Scully (2006) are
reasonable as derived from numerous detailed IR observations, and (2) spectral
indexes in the range 1 < \Gamma < 1.5 have been shown to be obtainable from
relativistic shock acceleration under the astrophysical conditions extant in
blazar flares (Stecker, Baring & Summerlin 2007), the fits to the observations
of 1ES0229+200 using our previous IR SEDs are consistent with both the IR and
gamma-ray observations. Our analysis presents evidence indicating that the
energy spectrum of relativistic particles in 1ES0229+200 is produced by
relativistic shock acceleration, producing an intrinsic gamma-ray spectrum with
index 1 < \Gamma < 1.5 and with no evidence of a peak in the SED up to energies
~15 TeV.

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The categories of this paper are: quant-ph
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The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: stat