Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gaia pulsars and where to find them in EDR3   The Early Gaia Data Release 3 (EDR3) provides precise astrometry for nearly
1.5 billion sources across the entire sky. A few tens of these are associated
with neutron stars in the Milky Way and Magellanic Clouds. Here, we report on a
search for EDR3 counterparts to known rotation-powered pulsars using the method
outlined in Antoniadis (2021). A cross-correlation between EDR3 and the ATNF
pulsar catalogue identifies 41 close astrometric pairs ($< 0.5$ arcsec at the
reference epoch of the pulsar position). Twenty six of these are related to
previously-known optical counterparts, while the rest are candidate pairs that
require further follow-up. Highlights include the Crab Pulsar (PSR B0531+21),
for which EDR3 yields a distance of $2.08^{+0.78}_{-0.45}$ kpc (or
$2.00_{-0.38}^{+0.56}$ kpc taking into account the dispersion-measure prior;
errors indicate 95% confidence limits) and PSR J1638-4608, a pulsar thus-far
considered to be isolated that lies within 0.056 arcsec of a Gaia source.

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The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
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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: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat