Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Doppler Boosting and Deboosting Effects in the Forward Relativistic Jets
  of AGNs and GRBs   It is widely accepted that the Doppler deboosting effects exist in counter
relativistic jets. However, people often neglect another important fact that
both Doppler boosting and deboosting effects could happen in forward
relativistic jets. Such effects might be used to explain some strange
phenomena, such as the invisible gaps between the inner and outer jets of AGNs,
and the rapid initial decays and re-brightening bumps in the light curves of
GRBs.

29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th