High-precision timing of PSR J1600−3053 |
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| Authors: | S M Ord B A Jacoby A W Hotan M Bailes |
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| Institution: | Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Mail 31 PO Box, 218 VIC 3122, Australia;Research Centre for Theoretical Astrophysics, The University of Sydney, Sydney, NSW 2006, Australia;Naval Research Laboratory Code 7213 4555 Overlook Avenue, SW Washington, DC 20375 USA |
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| Abstract: | We present the results of a high-precision timing campaign directed at the binary millisecond pulsar J1600?3053. Submicrosecond pulsar timing has long been the domain of bright, low dispersion measure millisecond pulsars or large diameter telescopes. This experiment, conducted using the Parkes radio telescope in New South Wales, Australia, and utilizing the latest baseband recording hardware, has allowed this pulsar, although distant and faint, to present residuals to a model of its spin behaviour of 650 ns over a period of more than 2 yr. We have also constrained the orbital inclination via Shapiro delay to be between 59° and 70° to 95 per cent confidence and obtained a scintillation velocity measurement indicating a transverse velocity less than 84 km s?1. This pulsar is demonstrating remarkable stability comparable to, and in most cases improving upon, the very best long-term pulsar timing experiments. If this stability is maintained, the current limits on the energy density of the stochastic gravitational wave background will be reached in four more years. |
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| Keywords: | astrometry binaries: general stars: neutron pulsars: individual: PSR J1600?3053 white dwarfs |
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