Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A double component in the prompt emission of GRB 090618   GRB 090618 offered an unprecedented opportunity to have coordinated data, by
the best of the X and Gamma Ray observatories, of the nearest (z = 0.54)
energetic source (10$^{54}$ erg). Using the Fermi-GBM observations of this GRB,
we have analyzed this source to explore the possibility of having components
yet to be observed in other sources. We show that it is not possible to
interpret GRB 090618 within the framework of the traditional single component
GRB model. We argue that the observation of the first episode of duration of
around 50s could not be a part of a canonical GRB, while the residual emission
could be modeled easily with the models existing in literature. In this work we
have considered the case of the fireshell scenario.

11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat