Development of a Pulsar-Based Time-Scale
MetadataShow full item record
This article has been published in Monthly Notices of the Royal Astronomical Society. © 2012 The Authors. Published by Oxford University Press on behalf of Royal Astronomical Society. All rights reserved.
Using observations of pulsars from the Parkes Pulsar Timing Array (PPTA) project we develop the first pulsar-based time-scale that has a precision comparable to the uncertainties in International Atomic Time-scales (TAI). Our ensemble of pulsars provides an Ensemble Pulsar Scale (EPS) analogous to the free atomic time-scale Échelle Atomique Libre. The EPS can be used to detect fluctuations in atomic time-scales and therefore can lead to a new realization of Terrestrial Time, TT(PPTA11). We successfully follow features known to affect the frequency of the TAI, and we find marginally significant differences between TT(PPTA11) and TT(BIPM11). We discuss the various phenomena that lead to a correlated signal in the pulsar timing residuals and therefore limit the stability of the pulsar time-scale.
Showing items related by title, author, creator and subject.
Yu, M.; Manchester, R.; Hobbs, G.; Johnston, S.; Kaspi, V.; Keith, M.; Lyne, A.; Qiao, G.; Ravi, V.; Sarkissian, J.; Shannon, Ryan; Xu, R. (2013)Timing observations from the Parkes 64-m radio telescope for 165 pulsars between 1990 and 2011 have been searched for period glitches. Data spans for each pulsar ranged between 5.3 and 20.8 yr. From the total of 1911 yr ...
Bell, M.; Murphy, T.; Johnston, S.; Kaplan, D.; Croft, S.; Hancock, P.; Callingham, J.; Zic, A.; Dobie, D.; Swiggum, J.; Rowlinson, A.; Hurley-Walker, N.; Offringa, A.; Bernardi, G.; Bowman, J.; Briggs, F.; Cappallo, R.; Deshpande, A.; Gaensler, B.; Greenhill, L.; Hazelton, B.; Johnston-Hollitt, M.; Lonsdale, C.; McWhirter, S.; Mitchell, D.; Morales, M.; Morgan, E.; Oberoi, D.; Ord, S.; Prabu, T.; Udaya Shankar, N.; Srivani, K.; Subrahmanyan, R.; Tingay, Steven; Wayth, Randall; Webster, R.; Williams, A.; Williams, C. (2016)We present 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range −80° < δ < 10°, we detect 17 known pulsars with mean flux density greater ...
The High Time Resolution Universe Pulsar Survey - III. Single-pulse searches and preliminary analysisBurke-Spolaor, S.; Bailes, M.; Johnston, S.; Bates, S.; Bhat, Ramesh; Burgay, M.; D'Amico, N.; Jameson, A.; Keith, M.; Kramer, M.; Levin, L.; Milia, S.; Possenti, A.; Stappers, B.; van Straten, W. (2011)We present the search methods and initial results for transient radio signals in the High Time Resolution Universe (HTRU) survey. The HTRU survey's single-pulse search, the software designed to perform the search and a ...