Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: RRATs: New Discoveries, Timing Solutions & Musings   We describe observations of Rotating RAdio Transients (RRATs) that were
discovered in a re-analysis of the Parkes Multi-beam Pulsar Survey (PMPS). The
sources have now been monitored for sufficiently long to obtain seven new
coherent timing solutions, to make a total of 14 now known. Furthermore we
announce the discovery of 7 new transient sources, one of which may be
extragalactic in origin (with $z\sim0.1$) and would then be a second example of
the so-called `Lorimer burst'. The timing solutions allow us to infer neutron
star characteristics such as energy-loss rate, magnetic field strength and
evolutionary timescales, as well as facilitating multi-wavelength followup by
providing accurate astrometry. All of this enables us to consider the question
of whether or not RRATs are in any way special, i.e. a distinct and separate
population of neutron stars, as has been previously suggested. We see no reason
to consider 'RRAT' as anything other than a detection label, the subject of a
selection effect in the parameter space searched. However, single-pulse
searches can be utilised to great effect to identify pulsars difficult, or
impossible, to find by other means, in particular those with long-periods (half
of the PMPS RRATs have periods greater than 4 seconds), high-magnetic field
strengths ($B\gtrsim 10^{13}$ G) and pulsars approaching the 'death valley'.
The detailed nulling properties of such pulsars are unknown but the mounting
evidence suggests a broad range of behaviour in the pulsar population. The
group of RRATs fit in to the picture where pulsar magnetospheres switch between
stable configurations.

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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: q-alg