Colloquium: Comparison of astrophysical and terrestrial frequency standards

  title={Colloquium: Comparison of astrophysical and terrestrial frequency standards},
  author={John Gideon Hartnett and Andre Nicholas Luiten},
  journal={Reviews of Modern Physics},
The stability of pulse arrival times from pulsars and white dwarfs have been reanalyzed using several analysis tools for measuring the noise characteristics of sampled time and frequency data. The best terrestrial artificial clocks are shown to substantially exceed the performance of astronomical sources as timekeepers in terms of accuracy (as defined by cesium primary frequency standards) and stability. This superiority in stability can be directly demonstrated over time periods up to 2 years… Expand

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