Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for Sources of Primary Cosmic Rays at Energies Above 0.1 Pev at
  Tien Shan   Analysis of the experimental data of joint Russian - Hungarian research was
carried out at Tien Shan station on the search of sources of primary cosmic
rays (PCR) at energies 0.1-1.0 PeV. Maps of extensive air shower arrival
directions were presented where the standard deviation of mean event numbers in
equatorial co-ordinates exceeded a definite value. The excess of EAS number was
observed from an Galaxy object - the SN remnant and some other directions. The
young pulsar PSR 0656+14 located near the centre of this object.

17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph