Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Profile Stochasticity in PSR J1909-3744   We extend the recently introduced Bayesian framework `Generative Pulsar
Timing Analysis' to incorporate both pulse jitter (high frequency variation in
the arrival time of the pulse) and epoch to epoch stochasticity in the shape of
the pulse profile. This framework allows for a full timing analysis to be
performed on the folded profile data, rather than the site arrival times as is
typical in most timing studies. We apply this extended framework both to
simulations, and to an 11 yr, 10 cm data set for PSR J1909$-$3744. Using
simulations, we show that temporal profile variation can induce timing noise in
the residuals that when performing a standard timing analysis is highly
covariant with the signal expected from a gravitational wave (GW) background.
When working in the profile domain, these variations are de-correlated from the
expected GW signal, resulting in significant improvement in the obtained upper
limits. Using the PSR J1909$-$3744 data set from the Parkes Pulsar Timing Array
project, we find significant evidence for systematic high-frequency profile
variation resulting from non-Gaussian noise in the oldest observing system, but
no evidence for either detectable pulse jitter, or low-frequency profile shape
variation. Using our profile domain framework we therefore obtain upper limits
on a red noise process with a spectral index of $\gamma = 13/3$ of
$1\times10^{-15}$, consistent with previously published limits.

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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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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: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th