Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ordinary X-rays from Three Extraordinary Millisecond Pulsars: XMM-Newton
  Observations of PSRs J0337+1715, J0636+5129, and J0645+5158   We present the first X-ray observations of three recently discovered
millisecond pulsars (MSPs) with interesting characteristics: PSR J0337+1715,
PSR J0636+5129, and PSR J0645+5158. PSR J0337+1715 is a fast-spinning, bright,
and so-far unique MSP in a hierarchical triple system with two white dwarf (WD)
companions. PSR J0636+5129 is a MSP in a very tight 96-min orbit with a
low-mass, 8 $M_J$ companion. PSR J0645+5158 is a nearby, isolated MSP with a
very small duty cycle (1-2%), which has led to its inclusion in high-precision
pulsar timing programs. Using data from XMM-Newton, we have analyzed X-ray
spectroscopy for these three objects, as well as optical/ultraviolet photometry
for PSR J0337+1715. The X-ray data for each are largely consistent with
expectations for most MSPs with regards to the ratios of thermal and
non-thermal emission. We discuss the implications of these data on the pulsar
population, and prospects for future observations of these pulsars.

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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys