Searching for gravitational waves from the Crab pulsar - the problem of timing noise

Details Searching for gravitational waves from the Crab pulsar - the problem of timing noise Searching for gravitational waves from the Crab pulsar - the problem of timing noise

2003-12-10

arxiv.org/abs/gr-qc/0312057v1

Class.Quant.Grav. 21 (2004) S843-S846

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, 1 figure, Proceedings of the 5th Amaldi Conference on Gravitational Waves, Pisa, Italy, 6-11 July 2003

Scientific paper

10.1088/0264-9381/21/5/069

Of the current known pulsars, the Crab pulsar (B0531+21) is one of the most promising sources of gravitational waves. The relatively large timing noise of the Crab causes its phase evolution to depart from a simple spin-down model. This effect needs to be taken in to account when performing time domain searches for the Crab pulsar in order to avoid severely degrading the search efficiency. The Jodrell Bank Crab pulsar ephemeris is examined to see if it can be used for tracking the phase evolution of any gravitational wave signal from the pulsar, and we present a method of heterodyning the data that takes account of the phase wander. The possibility of obtaining physical information about the pulsar from comparisons of the electromagnetically and a gravitationally observed timing noise is discussed. Finally, additional problems caused by pulsar glitches are discussed.

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