Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical/near-IR observations of Gamma-Ray Bursts in the Afterglow Era   An overview of the optical and near-IR observations of GRBs in the Afterglow
Era is presented, covering the period 1997-2000. They have allowed to a better
understanding of the underlying GRB physics as well as to constraint the
progenitor models.

34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an