The Parkes Pulsar Timing Array

Details The Parkes Pulsar Timing Array The Parkes Pulsar Timing Array

2006-04-13

arxiv.org/abs/astro-ph/0604288v1

Astronomy and Astrophysics

Astrophysics

10 pages, in press ChJAA

Scientific paper

Given sufficient sensitivity, pulsar timing observations can make a direct detection of gravitational waves passing over the Earth. Pulsar timing is most sensitive to gravitational waves with frequencies in the nanoHertz region, with the most likely astronomical sources being binary super-massive black holes in galaxy cores. The Parkes Pulsar Timing Array project uses the Parkes 64-m radio telescope to make precision timing observations of a sample of about 20 millisecond pulsars with a principal goal of making a direct detection of gravitational waves. Observations commenced about one year ago and so far sub-microsecond timing residuals have been achieved for more than half of these pulsars. New receiver and software systems are being developed with the aim of reducing these residuals to the level believed necessary for a positive detection of gravitational waves.

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