Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SN 1998bw--GRB 980425: A supernova explosion with a close massive
  companion?   Some gamma ray bursts may be produced by supernovae exploding in close
massive binary systems (type Ib/c supernovae) as suggested by the recent
observation of SN 1998bw/GRB 980425. We propose that high energy radiation
observed in such gamma ray bursts may be produced by synchrotron radiation of
electrons accelerated by 1st order Fermi acceleration at a quasi-stationary
shock in the high velocity SN ejecta colliding with the companion star or some
other nearby massive object. Nuclei would also be accelerated, and could give
rise to an observable fluence of high energy neutrinos at Earth.
  This paper has been withdrawn by the authors following evidence that SN
1998bw and GRB 980425 are two distinct sources.

21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc