Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gamma-ray burst afterglow theory   It is by now fairly well established that gamma-ray burst afterglows result
from initially relativistic outflows interacting with the medium surrounding
the burster and emitting non-thermal radiation ranging from radio to X-rays.
However, beyond that, many big and small questions remain about afterglows,
with the accumulating amount of observational data at the various frequencies
raising as many questions as they answer. In this review I highlight a number
of current theoretical issues and how they fit or do not fit within our basic
theoretical framework. In addition to theoretical progress I will also
emphasize the increasing role and usefulness of numerical studies of afterglow
blast waves and their radiation.

5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat