Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Type Ibn supernova SN~2010al: Powerful mass loss half year prior to the
  explosion   Type Ibn supernova SN~2010al is explored to infer parameters of supernova and
a circumstellar (CS) shell. The CS interaction model combined with the spectral
model of 4600\AA\ blend suggests the explosion of a WR star with the energy of
$(1-1.5)\times10^{51}$ erg inside a dense confined CS shell with the mass of
$\sim0.1$\msun\ and kinetic energy of $\sim 10^{48}$ erg. The confined CS shell
has been formed during the last 0.4 yr prior to the core collapse.

14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci