Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Iron K-shell features of MXB 1728-34 from a Simultaneous
  Chandra-RXTE Observation   We report on a simultaneous Chandra and RossiXTE observation of the low-mass
X-ray binary atoll bursting source MXB 1728-34 performed on 2002 March 3-5. We
fit the 1.2-35 keV continuum spectrum with a blackbody plus a Comptonized
component. Large residuals at 6-10 keV can be fitted by a broad (FWHM ~ 2 keV)
Gaussian emission line or, alternatively, by two absorption edges associated
with lowly ionized iron and Fe XXV/XXVI at ~7.1 keV and ~9 keV, respectively.
In this interpretation, we find no evidence of broad, or narrow, emission lines
between 6 and 7 keV. We test our alternative modelling of the iron K shell
region by reanalysing a previous BeppoSAX observation of MXB 1728-34, finding a
general agreement with our new spectral model.

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The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
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The categories of this paper are: eess
37
The categories of this paper are: supr-con