Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A wide field survey at the Northern Ecliptic Pole I: Number counts and
  angular correlation functions in K   We present the results from a multi colour survey performed at the Northern
Ecliptic Pole (NEP). The survey is designed to identify the counterparts of
faint sources from the ROSAT All Sky Survey and the IRAS survey and to study
their optical/near-infrared properties. We observed the central square degree
around the NEP in the optical bands B_J and R and in the near-infrared band K.
A shallower survey was carried out in the optical I band. Here we present the
results of the K-band survey. We discuss the source counts in the magnitude
range 7mag < K < 17.5mag and the angular correlation function of galaxies with
K < 17.0mag. The galaxy counts at the NEP display a subeuklidean slope in
dlog(N)/dm. Our shallower slope does not require the large effects of galaxy
evolution or density evolution suggested to explain the steeper slopes found in
earlier surveys. The angular correlation function of galaxies follows a power
law w(\theta) = A\theta^-\delta with A=5.7+-0.8 x 10^-3 and \delta=0.98+-0.15.
This is in accordance with the expected values for stable clustering.

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The categories of this paper are: econ
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The categories of this paper are: math
5
The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: hep-th
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The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ph
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg