English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

High-sensitivity radio-frequency observations of millisecond pulsars usuallyshow stochastic, broadband, pulse-shape variations intrinsic to the pulsaremission process. These variations induce jitter noise in pulsar timingobservations; understanding the properties of this noise is of particularimportance for the effort to detect gravitational waves with pulsar timingarrays. We assess the short-term profile and timing stability of 22 millisecondpulsars that are part of the Parkes Pulsar Timing Array sample by examiningintra-observation arrival time variability and single-pulse phenomenology. In 7of the 22 pulsars, in the band centred at approximately 1400MHz, we find thatthe brightest observations are limited by intrinsic jitter. We find consistentresults, either detections or upper limits, for jitter noise in other frequencybands. PSR J1909-3744 shows the lowest levels of jitter noise, which weestimate to contribute $\sim$10 ns root mean square error to the arrival timesfor hour-duration observations. Larger levels of jitter noise are found inpulsars with wider pulses and distributions of pulse intensities. The jitternoise in PSR J0437-4715 decorrelates over a bandwidth of $\sim$2 GHz. We showthat the uncertainties associated with timing pulsar models can be improved byincluding physically motivated jitter uncertainties. Pulse-shape variationswill limit the timing precision at future, more sensitive, telescopes; it isimperative to account for this noise when designing instrumentation and timingcampaigns for these facilities.

Limitations in timing precision due to single-pulse shape variability in millisecond pulsars