Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Statistical and systematic uncertainties in the event reconstruction and
  S(1000) determination by the Pierre Auger surface detector   We discuss the statistical and systematic uncertainties in the event
reconstruction (core location, and determination of S(1000), i.e., the signal
at a distance of 1000 m from the shower core) by the Pierre Auger surface
detector for showers with zenith angle less than 60 degrees. The method is
based on a maximum likelihood method where the reference lateral distribution
function is obtained through the experimental data. We also discuss S(1000) as
primary energy estimator.

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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: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: cond-mat
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: q-bio