Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: I. Inverse Compton origin of pulsar \gamma-ray emission. II.
  Reconnection model of Crab flares   I. There is growing evidence that pulsars' high energy emission is generated
via Inverse Compton mechanism.
  II. The particles producing Crab flares, and possibly most of the Crab
Nebula's high energy emission, are accelerated via reconnection events, and not
at shock via Fermi mechanisms.

10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg