Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New insights on the puzzling LMXB 1RXS J180408.9-342058: the
  intermediate state, the clocked type-I X-ray bursts and much more   1RXS J180408.9--342058 is a low mass X-ray binary hosting a neutron star,
which shows X-ray activity at very different mass-accretion regimes, from very
faint to almost the Eddington luminosity. In this work, we present a
comprehensive X-ray study of this source using data from the Neil Gehrels Swift
Observatory, NuSTAR and INTEGRAL/JEM-X. In order to follow the spectral
evolution, we analysed the 2015 outburst using Swift data and three Nustar
observations. Besides the canonical hard and soft spectral states, we
identified the rarely observed intermediate state. This was witnessed by the
appeareance of the accretion disk emission in the spectrum (at $kT_{\rm disk}$
$\sim$0.7 keV) and the simultaneous cooling of the hot corona. In addition, we
also unveiled a hard tail above 30 keV in this state. In the hard state, a
thermal Comptonization model with two seed photons populations ($kT_{\rm
s,1}\sim 1.5$ keV and $kT_{\rm s,2}\sim 0.4$ keV, respectively) and a hot
Comptonising plasma, represents the physically best motivated scenario to
describe the data. We also estimated a reflection fraction below 20% in all
states, while no constraints on the inclination and only lower limits on the
inner disk radius could be inferred. Finally, we studied a number of type-I
X-ray bursts displayed from the source, one of them at the Eddington limit
(observed with JEM-X). Their characteristics, combined with the clocked
behaviour observed during the intermediate state, point out H/He composition
for the accreted material, which makes unlikely the helium dwarf nature for the
companion.

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The categories of this paper are: hep-ph
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The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: stat