Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: BeppoSAX and Ulysses data on the giant flare from SGR 1900+14   The extraordinary giant flare of 1998 August 27 from SGR 1900+14 was the most
intense event ever detected from this or any other cosmic source (even more
intense than the famous March 5th 1979 event). It was longer than any previous
burst from SGR1900+14 by more than one order of magnitude, and it displayed the
same 5.16-s periodicity in hard X-rays that was detected in the low energy
X-ray flux of its quiescent counterpart. The event was detected by several
gamma-ray experiments in space, among them the Ulysses gamma-ray burst detector
and the BeppoSAX Gamma Ray Burst Monitor. These instruments operate in
different energy ranges, and a comparison of their data shows that the event
emitted a strongly energy-dependent flux, and displayed strong spectral
evolution during the outburst itself. Here we present a joint analysis of the
BeppoSAX and Ulysses data, in order to identify the energy-dependent features
of this event and understand some of the physical conditions in the environment
of the neutron star which generated this flare.

16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc