Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: New results on particle acceleration in the Centaurus A jet and
  counterjet from a deep Chandra observation
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci