Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Search for X-ray Counterparts of Radio Pulsars   We describe a systematic search for X-ray counterparts of radio pulsars. The
search was accomplished by cross-correlating the radio timing positions of all
radio pulsars from the ATNF pulsar database (version 1.54) with archival
XMM-Newton and Chandra observations publicly released by July 1st 2016. In
total, 178 of the archival XMM-Newton observations and 213 of the archival
Chandra datasets where found to have a radio pulsar serendipitously in the
field of view. From the 288 radio pulsars covered by these datasets we
identified 20 previously undetected X-ray counterparts. For 6 of them the
statistics was sufficient to model the energy spectrum with one- or
two-component models. For the remaining new detections and for those pulsars
for which we determined an upper limit to their counting rate we computed the
energy flux by assuming a Crab-like spectrum. Additionally, we derived upper
limits on the neutron stars' surface temperature and on the non-thermal X-ray
efficiency for those pulsars for which the spin-down energy was known. The
temperature upper limits where compared with predictions from various neutron
star cooling models and where found to be in agreement with the minimal cooling
paradigm

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The categories of this paper are: math
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: physics
25
The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess