Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Investigation of the possible source for solar energetic particle event
  of 2017 September 10   According to the solar protons' data observed by Geostationary Operational
Environmental Satellites (GOES) and neutron monitors on the ground of the
Earth, and near-relativistic electrons data measured by the ACE spacecraft, the
onset times of protons with different energies and near-relativistic electrons
have been estimated and compared with the time of solar soft and hard X-ray and
radio burst data. The results show that first arriving relativistic and
non-relativistic protons and electrons may be accelerated by the concurrent
flare. The results also suggest that release times of protons with different
energies may be different, and the protons with lower energy may release
earlier than those with higher energy. Some protons accelerated by concurrent
flares may be further accelerated by CME-driven shock.

27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs