Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: FAST early pulsar discoveries: Effelsberg follow-up   We report the follow-up of 10 pulsars discovered by the Five-hundred-meter
Aperture Spherical radio-Telescope (FAST) during its commissioning. The pulsars
were discovered at a frequency of 500-MHz using the ultra-wide-band (UWB)
receiver in drift-scan mode, as part of the Commensal Radio Astronomy FAST
Survey (CRAFTS). We carried out the timing campaign with the 100-m Effelsberg
radio-telescope at L-band around 1.36 GHz. Along with 11 FAST pulsars
previously reported, FAST seems to be uncovering a population of older pulsars,
bordering and/or even across the pulsar death-lines. We report here two sources
with notable characteristics. PSR J1951$+$4724 is a young and energetic pulsar
with nearly 100% of linearly polarized flux density and visible up to an
observing frequency of 8 GHz. PSR J2338+4818, a mildly recycled pulsar in a
95.2-d orbit with a Carbon-Oxygen white dwarf (WD) companion of $\gtrsim
1\rm{M}_{\odot}$, based on estimates from the mass function. This system is the
widest WD binary with the most massive companion known to-date. Conspicuous
discrepancy was found between estimations based on NE2001 and YMW16 electron
density models, which can be attributed to under-representation of pulsars in
the sky region between Galactic longitudes $70^o<l<100^o$. This work represents
one of the early CRAFTS results, which start to show potential to substantially
enrich the pulsar sample and refine the Galactic electron density model.

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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-th