Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SGR 1806-20 about two years after the giant flare: Suzaku, XMM-Newton
  and INTEGRAL observations   In December 2004, the soft gamma-ray repeater SGR 1806-20 emitted the most
powerful giant flare ever observed. This probably involved a large-scale
rearrangement of the magnetosphere leading to observable variations in the
properties of its X-ray emission. Here we present the results of the first
Suzaku observation of SGR 1806-20, together with almost simultaneous
observations with XMM-Newton and INTEGRAL. The source seems to have reached a
state characterized by a flux close to the pre-flare level and by a relatively
soft spectrum. Despite this, SGR 1806-20 remained quite active also after the
giant flare, allowing us to study several short bursts observed by Suzaku in
the 1-100 keV range. We discuss the broad-band spectral properties of SGR
1806-20, covering both persistent and bursting emission, in the context of the
magnetar model, and consider its recent theoretical developments.

15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex