Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A BeppoSAX observation of the X-ray pulsar 1E 2259+586 and the supernova
  remnant G109.1-1.0 (CTB 109)   The 7 s X-ray pulsar 1E2259+586 and the supernova remnant (SNR) G109.1-1.0
(CTB 109) were observed by BeppoSAX in 1996 November. The pulse period of
6.978914 +/- 0.000006 s implies that the source continues its near constant
spin-down trend. The 0.5-10 keV pulse shape is characterized by a double peaked
profile, with the amplitude of the second peak ~50% of that of the main peak.
The pulse profile does not exhibit any strong energy dependence. We confirm the
ASCA discovery of an additional low-energy spectral component from 1E2259+586.
This can best be modeled as a 0.44 keV blackbody, but we cannot exclude that
some, or all, of this emission arises from the part of the SNR that lies within
the pulsar's extraction region.
  The spectrum of G109.1-1.0 is well fit with a non-equilibrium ionization
plasma model with a best-fit temperature of 0.95 keV. The derived mass for the
X-ray emitting plasma (~15-20 solar masses) and its near cosmic abundances
imply that the X-ray emission comes mainly from mildly enriched, swept-up
circumstellar material. The spectrum is strongly out of equilibrium with an
ionization age of only 3000 yr. This age is in good agreement with that derived
from hydrodynamic simulations of the SNR using the above X-ray temperature.

9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th