Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A search for small and medium scale anisotropy of cosmic rays above 1
  PeV registered at the Tunka-133 array   A search for anisotropy at different scales in the arrival directions of
cosmic rays with energies above 1 PeV is performed with data of the Tunka-133
array. A number of regions with angular sizes up to approximately 30 degrees
that deviate from the uniform background with a statistical significance
greater than three standard deviations are found using the shuffling technique
both in the complete data set and its subsets in different energy ranges. Some
regions with an excess of cosmic rays correlate with the distribution of
possible cosmic ray sources. A comparison of the results with a similar
analysis of the legacy data of the EAS MSU array is presented.

22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci