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Development of a pulsar-based time-scale

Hobbs, G. and Coles, W. and Manchester, R. N. and Keith, M. J. and Shannon, R. M. and Chen, D. and Bailes, M. and Bhat, N. D. R. and Burke-Spolaor, S. and Champion, D. and Chaudhary, A. and Hotan, A. and Khoo, J. and Kocz, J. and Levin, Y. and Oslowski, S. and Preisig, B. and Ravi, V. and Reynolds, J. E. and Sarkissian, J. and van Straten, W. and Verbiest, J. P. W. and Yardley, D. and You, X. P. (2012) Development of a pulsar-based time-scale. Monthly Notices of the Royal Astronomical Society, 427 (4). pp. 2780-2787. ISSN 0035-8711.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Bailes, M.0000-0003-3294-3081
Burke-Spolaor, S.0000-0003-4052-7838
Kocz, J.0000-0003-0249-7586
Ravi, V.0000-0002-7252-5485
Alternate Title:Development of a pulsar-based timescale
Additional Information:© 2012 The Authors. Monthly Notices of the Royal Astronomical Society © 2012 RAS. Accepted 2012 August 15. Received 2012 August 14; in original form 2012 June 8. Published: 21 December 2012. The Parkes radio telescope is part of the Australia Telescope which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. The PPTA project was initiated with support from RNM's Australian Research Council (ARC) Federation Fellowship (FF0348478). GH acknowledges support from the National Natural Science Foundation of China (NSFC) #10803006 and #11010250 and the Australian Research Council #DP0878388. JPWV was supported by the European Union under Marie-Curie Intra-European Fellowship 236394. We thank the referee, Gérard Petit, for extremely useful comments on the paper.
Funding AgencyGrant Number
Australian Research CouncilFF0348478
National Natural Science Foundation of China10803006
National Natural Science Foundation of China11010250
Australian Research CouncilDP0878388
Marie Curie Fellowship236394
Subject Keywords:time – pulsars: general
Issue or Number:4
Record Number:CaltechAUTHORS:20130214-090244663
Persistent URL:
Official Citation:G. Hobbs, W. Coles, R. N. Manchester, M. J. Keith, R. M. Shannon, D. Chen, M. Bailes, N. D. R. Bhat, S. Burke-Spolaor, D. Champion, A. Chaudhary, A. Hotan, J. Khoo, J. Kocz, Y. Levin, S. Oslowski, B. Preisig, V. Ravi, J. E. Reynolds, J. Sarkissian, W. van Straten, J. P. W. Verbiest, D. Yardley, X. P. You; Development of a pulsar-based time-scale, Monthly Notices of the Royal Astronomical Society, Volume 427, Issue 4, 21 December 2012, Pages 2780–2787,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36915
Deposited By: JoAnn Boyd
Deposited On:05 Mar 2013 18:55
Last Modified:06 Nov 2019 21:00

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