Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutron Star Masses from Arecibo Timing Observations of Five
  Pulsar-White Dwarf Binary Systems   We have detected relativistic and/or kinematic post-Keplerian parameters of
no fewer than five pulsar-white dwarf binary systems in long-term timing
observations at Arecibo. We discuss the resulting constraints on pulsar and
companion masses. The general trend is that the pulsar mass measurements are
compatible with the canonical value of 1.35 solar masses, but in most cases
somewhat higher masses are preferred.

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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: cond-mat
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The categories of this paper are: math
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: math-ph
1
The categories of this paper are: cs