Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical/Multiwavelength Observations of GRB Afterglows   I review gamma-ray burst optical/multiwavelength afterglow observations since
1997, when the first counterparts to GRBs were discovered. I discuss what we
have learned from multiwavelength observations of GRB afterglows in relation to
the `standard' fireball plus relativistic blast-wave models. To first order the
`standard' model describes the afterglow observations well, but a wealth of
information can be gathered from the deviations of GRB afterglow observations
from this `standard' model. These deviations provide information on the nature
of the progenitor and on the physics of GRB production. In particular I focus
on the possible connection of GRBs to supernovae, on jet and circumstellar wind
models, on the early-time afterglow, and on the emission from the reverse
shock.

35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph