Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Galactic magnetic field as spectrograph for ultra-high energy cosmic
  rays   We study the influence of the regular component of the Galactic magnetic
field (GMF) on the arrival directions of ultra-high energy cosmic rays
(UHECRs). We find that, if the angular resolution of current experiments has to
be fully exploited, deflections in the GMF cannot be neglected even for E=10^20
eV protons, especially for trajectories along the Galactic plane or crossing
the Galactic center region. On the other hand, the GMF could be used as a
spectrograph to discriminate among different source models and/or primaries of
UHECRs, if its structure would be known with sufficient precision. We compare
several GMF models introduced in the literature and discuss for the example of
the AGASA data set how the significance of small-scale clustering or
correlations with given astrophysical sources are affected by the GMF. We point
out that the non-uniform exposure to the extragalactic sky induced by the GMF
should be taken into account estimating the significance of potential
(auto-)correlation signals.

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The categories of this paper are: nlin
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: econ
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess