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A Pulsar Time Scale Based on Parkes Observations in 1995–2010

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Abstract

Timing of highly stable millisecond pulsars provides the possibility of independently verifying terrestrial time scales on intervals longer than a year. An ensemble pulsar time scale is constructed based on pulsar timing data obtained on the 64-m Parkes telescope (Australia) in 1995–2010. Optimal Wiener filters were applied to enhance the accuracy of the ensemble time scale. The run of the time-scale difference PTens−TT(BIPM2011) does not exceed 0.8 ± 0.4 μs over the entire studied time interval. The fractional instability of the difference PTens−TT(BIPM2011) over 15 years is σ z = (0.6 ± 1.6) × 10−15, which corresponds to an upper limit for the energy density of the gravitational-wave background Ω g h2 ~ 10−10 and variations in the gravitational potential ~10−15 Hz at the frequency 2 × 10−9 Hz.

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Authors and Affiliations

  1. Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia

    A. E. Rodin & V. A. Fedorova

  2. Pushchino State Natural Science Institute, Pushchino, Moscow oblast, Russia

    V. A. Fedorova

Authors
  1. A. E. Rodin
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  2. V. A. Fedorova
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Correspondence to A. E. Rodin.

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Original Russian Text © A.E. Rodin, V.A. Fedorova, 2018, published in Astronomicheskii Zhurnal, 2018, Vol. 95, No. 6, pp. 401–406.

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Rodin, A.E., Fedorova, V.A. A Pulsar Time Scale Based on Parkes Observations in 1995–2010. Astron. Rep. 62, 378–382 (2018). https://doi.org/10.1134/S1063772918060057

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  • DOI: https://doi.org/10.1134/S1063772918060057

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