Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Regions of an excessive flux of cosmic rays according to data of the
  FIAN and MSU arrays   Results of a blind search for localized regions of an excessive flux of
cosmic rays in the energy range from 50 TeV to 20 PeV with the data of the FIAN
KLARA-Chronotron experiment, the EAS MSU array and the Prototype of the
EAS-1000 array are presented. A number of regions with a significant excess of
the registered flux over an expected isotropic background are found. Some of
the regions are present in at least two of the data sets considered.

22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th