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1. chinaXiv:201612.00090 [pdf]

Development of a pulsar-based timescale

G. Hobbs; W. Coles; R. N. Manchester; M. J. Keith,1 R. M. Shannon; D. Chen; M. Bailes,4 N. D. R. Bhat; S. Burke-Spolaor; D. Champion; A. Chaudhary; A. Hotan; J. Khoo,1 J. Kocz; Y. Levin; S.Oslowski; B. Preisig; V. Ravi; J. E. Reynolds; J. Sarkissian; W. van Straten; J. P. W. Verbiest; D. Yardley
Subjects: Geosciences >> Space Physics

Using observations of pulsars from the Parkes Pulsar Timing Array (PPTA) project we develop the first pulsar-based timescale that has a precision comparable to the uncertainties in international atomic timescales. Our ensemble of pulsars provides an Ensemble Pulsar Scale (EPS) analogous to the free atomic timescale 碋chelle Atomique Libre (EAL). The EPS can be used to detect fluctuations in atomic timescales and therefore can lead to a new realisation of Terrestrial Time, TT(PPTA11). We successfully follow features known to affect the frequency of the International Atomic Timescale (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 timescale.

submitted time 2016-12-22 Hits363Downloads195 Comment 0

2. chinaXiv:201612.00018 [pdf]

Development of a pulsar-based timescale

G. Hobbs; W. Coles; R. N. Manchester; M. J. Keith,1 R. M. Shannon; D. Chen; M. Bailes,4 N. D. R. Bhat; S. Burke-Spolaor; D. Champion; A. Chaudhary; A. Hotan; J. Khoo,1 J. Kocz; Y. Levin; S.Oslowski; B. Preisig; V. Ravi; J. E. Reynolds; J. Sarkissian; W. van Straten; J. P. W. Verbiest; D. Yardley
Subjects: Geosciences >> Space Physics

Using observations of pulsars from the Parkes Pulsar Timing Array (PPTA) project we develop the first pulsar-based timescale that has a precision comparable to the uncertainties in international atomic timescales. Our ensemble of pulsars provides an Ensemble Pulsar Scale (EPS) analogous to the free atomic timescale 碋chelle Atomique Libre (EAL). The EPS can be used to detect fluctuations in atomic timescales and therefore can lead to a new realisation of Terrestrial Time, TT(PPTA11). We successfully follow features known to affect the frequency of the International Atomic Timescale (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 timescale.

submitted time 2016-12-01 Hits390Downloads233 Comment 0

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