An insight into chromatic behaviour of jitter in pulsars and its modelling: A case study of PSR J0437$-$4715
A. D. Kulkarni; R. M. Shannon; D. J. Reardon; M. T. Miles; M. Bailes; M. Shamohammadi · 2024 · arXiv
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Abstract (excerpt)
Pulse-to-pulse profile shape variations introduce correlations in pulsar times of arrival (TOAs) across radio frequency measured at the same observational epoch. This leads to a broadband noise in excess of radiometer noise, which is termed pulse jitter noise. The presence of jitter noise limits the achievable timing precision and decreases the sensitivity of pulsar-timing data sets to signals of interest such as nanohertz-frequency gravitational waves. Current white noise models used in pulsar timing analyses attempt to account for this, assuming complete correlation of uncertainties through
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Metadata source: arXiv