Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Thousand-Pulsar-Array programme on MeerKAT III: Giant pulse
  characteristics of PSR J0540$-$6919   PSR J0540$-$6919 is the second-most energetic radio pulsar known and resides
in the Large Magellanic Cloud. Like the Crab pulsar it is observed to emit
giant radio pulses (GPs). We used the newly-commissioned PTUSE instrument on
the MeerKAT radio telescope to search for GPs across three observations. In a
total integration time of 5.7 hrs we detected 865 pulses above our 7$\sigma$
threshold. With full polarisation information for a subset of the data, we
estimated the Faraday rotation measure, $\rm{RM}=-245.8 \pm 1.0$ rad m$^{-2}$
toward the pulsar. The brightest of these pulses is $\sim$ 60% linearly
polarised but the pulse-to-pulse variability in the polarisation fraction is
significant. We find that the cumulative GP flux distribution follows a power
law distribution with index $-2.75 \pm 0.02$. Although the detected GPs make up
only $\sim$ 10% of the mean flux, their average pulse shape is
indistinguishable from the integrated pulse profile, and we postulate that
there is no underlying emission. The pulses are scattered at L-band frequencies
with the brightest pulse exhibiting a scattering time-scale of $\tau = 0.92 \pm
0.02$ ms at 1.2 GHz. We find several of the giants display very narrow-band
"flux knots" similar to those seen in many Fast Radio Bursts, which we assert
cannot be due to scintillation or plasma lensing. The GP time-of-arrival
distribution is found to be Poissonian on all but the shortest time-scales
where we find four GPs in six rotations, which if GPs are statistically
independent is expected to occur in only 1 of 7000 observations equivalent to
our data.

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The categories of this paper are: cs
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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: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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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: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
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The categories of this paper are: adap-org