Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Summary of Nuclear and Particle Astrophysics Sessions   Astrophysics is gaining increased attention from the particle and nuclear
physics communities, as budget cuts, delays, and cancellations limit
opportunities for breakthrough research at accelerator laboratories.
Observations of cosmic rays (protons and nuclei), gamma rays and neutrinos
present a variety of puzzles whose eventual solution will shed light on many
issues ranging from the nature of fundamental interactions at extreme energies
to the mechanisms of astrophysical sources. Several important detectors are
just beginning full-scale operation and others are beginning construction.

16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas