Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The FAST Galactic Plane Pulsar Snapshot survey: I. Project design and
  pulsar discoveries   Discovery of pulsars is one of the main goals for large radio telescopes. The
Five-hundred-meter Aperture Spherical radio Telescope (FAST), that incorporates
an L-band 19-beam receiver with a system temperature of about 20~K, is the most
sensitive radio telescope utilized for discovering pulsars. We designed the
{\it snapshot} observation mode for a FAST key science project, the Galactic
Plane Pulsar Snapshot (GPPS) survey, in which every four nearby pointings can
observe {\it a cover} of a sky patch of 0.1575 square degrees through
beam-switching of the L-band 19-beam receiver. The integration time for each
pointing is 300 seconds so that the GPPS observations for a cover can be made
in 21 minutes. The goal of the GPPS survey is to discover pulsars within the
Galactic latitude of $\pm10^{\circ}$ from the Galactic plane, and the highest
priority is given to the inner Galaxy within $\pm5^{\circ}$. Up to now, the
GPPS survey has discovered 201 pulsars, including currently the faintest
pulsars which cannot be detected by other telescopes, pulsars with extremely
high dispersion measures (DMs) which challenge the currently widely used models
for the Galactic electron density distribution, pulsars coincident with
supernova remnants, 40 millisecond pulsars, 16 binary pulsars, some nulling and
mode-changing pulsars and rotating radio transients (RRATs). The follow-up
observations for confirmation of new pulsars have polarization-signals recorded
for polarization profiles of the pulsars. Re-detection of previously known
pulsars in the survey data also leads to significant improvements in parameters
for 64 pulsars. The GPPS survey discoveries are published and will be updated
at http://zmtt.bao.ac.cn/GPPS/ .

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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: physics
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys