Paper:	Timing of the Binary Pulsar PSR B1259-63
Volume:	328, Binary Radio Pulsars
Page:	391
Authors:	Johnston, S.; Wang, N.; Manchester, R.N.
Abstract:	Timing of PSR B1259−63, the first radio pulsar discovered to have a massive main-sequence companion, has been carried out since 1990. The timing is complicated because the orbital period is very long, the pulsar is eclipsed for 40 days around periastron, the pulsar has significant timing noise and also has been seen to glitch. A model for the timing data based on spin-orbit coupling no longer provides a good fit to the data. We have proposed an alternative model which involves jumps in the inclination angle of the system at each periastron, however, the physical basis for this model is far from clear.

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