Skip to Main content Skip to Navigation
Journal articles

A pulsar-based time-scale from the International Pulsar Timing Array

Abstract : We have constructed a new time-scale, TT(IPTA16), based on observations of radio pulsars presented in the first data release from the International Pulsar Timing Array (IPTA). We used two analysis techniques with independent estimates of the noise models for the pulsar observations and different algorithms for obtaining the pulsar time-scale. The two analyses agree within the estimated uncertainties and both agree with TT(BIPM17), a post-corrected time-scale produced by the Bureau International des Poids et Mesures (BIPM). We show that both methods could detect significant errors in TT(BIPM17) if they were present. We estimate the stability of the atomic clocks from which TT(BIPM17) is derived using observations of four rubidium fountain clocks at the US Naval Observatory. Comparing the power spectrum of TT(IPTA16) with that of these fountain clocks suggests that pulsar-based time-scales are unlikely to contribute to the stability of the best time-scales over the next decade, but they will remain a valuable independent check on atomic time-scales. We also find that the stability of the pulsar-based time-scale is likely to be limited by our knowledge of solar-system dynamics, and that errors in TT(BIPM17) will not be a limiting factor for the primary goal of the IPTA, which is to search for the signatures of nano-Hertz gravitational waves.
Keywords : time pulsars: general
Complete list of metadata

Cited literature [59 references]  Display  Hide  Download
Contributor : INSPIRE HEP Connect in order to contact the contributor
Submitted on : Thursday, April 2, 2020 - 3:48:51 PM
Last modification on : Wednesday, May 11, 2022 - 12:44:04 PM


Publisher files allowed on an open archive




G. Hobbs, L. Guo, R.N. Caballero, W. Coles, K.J. Lee, et al.. A pulsar-based time-scale from the International Pulsar Timing Array. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2020, 491 (4), pp.5951-5965. ⟨10.1093/mnras/stz3071⟩. ⟨hal-02417063⟩



Record views


Files downloads