Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards Understanding Gamma-Ray Bursts   $\gamma$-ray bursts (GRBs) have puzzled astronomers since their accidental
discovery in the sixties. The BATSE detector on COMPTON-GRO satellite has been
detecting GRBs for the last four years at a rate of one burst per day. Its
findings has revolutionized our ideas about the nature of these objects. In
this lecture I show that the simplest, most conventional and practically
inevitable, interpretation of the observations is that GRBs form during the
conversion of the kinetic energy of ultra-relativistic particles to radiation.
The inner ``engine" that accelerates these particles is well hidden from direct
observations and its origin might remain mysterious for a long time.

14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org