Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Searches for Anisotropies in the Arrival Directions of the Highest
  Energy Cosmic Rays Detected by the Pierre Auger Observatory   We analyze the distribution of arrival directions of ultra-high energy cosmic
rays recorded at the Pierre Auger Observatory in 10 years of operation. The
data set, about three times larger than that used in earlier studies, includes
arrival directions with zenith angles up to $80^\circ$, thus covering from
$-90^\circ$ to $+45^\circ$ in declination. After updating the fraction of
events correlating with the active galactic nuclei (AGNs) in the V\'eron-Cetty
and V\'eron catalog, we subject the arrival directions of the data with
energies in excess of 40 EeV to different tests for anisotropy. We search for
localized excess fluxes and for self-clustering of event directions at angular
scales up to $30^\circ$ and for different threshold energies between 40~EeV and
80~EeV. We then look for correlations of cosmic rays with celestial structures
both in the Galaxy (the Galactic Center and Galactic Plane) and in the local
Universe (the Super-Galactic Plane). We also examine their correlation with
different populations of nearby extragalactic objects: galaxies in the 2MRS
catalog, AGNs detected by Swift-BAT, radio galaxies with jets and the
Centaurus~A galaxy. None of the tests shows a statistically significant
evidence of anisotropy. The strongest departures from isotropy (post-trial
probability ${\sim}1.4$\%) are obtained for cosmic rays with $E>58$~EeV in
rather large windows around Swift AGNs closer than 130~Mpc and brighter than
$10^{44}$~erg/s (18$^\circ$ radius) and around the direction of Centaurus~A
(15$^\circ$ radius).

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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
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The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: physics