Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic ray Spectrum, Composition, and Anisotropy Measured with IceCube   Analysis of cosmic ray surface data collected with the IceTop array of
Cherenkov detectors at the South Pole provides an accurate measurement of the
cosmic ray spectrum and its features in the "knee" region up to energies of
about 1 EeV. IceTop is part of the IceCube Observatory that includes a deep-ice
cubic kilometer detector that registers signals of penetrating muons and other
particles. Surface and in-ice signals detected in coincidence provide clear
insights into the nuclear composition of cosmic rays. IceCube already measured
an increase of the average primary mass as a function of energy. We present
preliminary results on both IceTop-only and coincident event analyses.
Furthermore, we review the recent measurement of the cosmic ray anisotropy with
IceCube.

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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: physics
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci