Long Term Timing Observations of PSR B1509-58
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We present an updated phase-coherent timing solution for the young, energetic pulsar PSR B1509-58 for twenty years of data. Using a partially phase-coherent timing analysis, we show that the second frequency derivative is changing in time implying a third frequency derivative of (-9+/-1)x10^-32 s^(-4). This value is consistent with the simple power law model of pulsar rotation.
2 pages. To appear in "Young Neutron Stars and Their Environments"(IAU Symposium 218, ASP Conference Proceedings), eds F. Camilo and B.M. Gaensler
2 pages. To appear in "Young Neutron Stars and Their Environments"(IAU Symposium 218, ASP Conference Proceedings), eds F. Camilo and B.M. Gaensler