A Precise Proper Motion for the Crab Pulsar, and the Difficulty of Testing Spin-Kick Alignment for Young Neutron Stars

@article{Kaplan2008APP,
  title={A Precise Proper Motion for the Crab Pulsar, and the Difficulty of Testing Spin-Kick Alignment for Young Neutron Stars},
  author={David L. Kaplan and Shami Chatterjee and Bryan M. Gaensler and J. M. Anderson},
  journal={The Astrophysical Journal},
  year={2008},
  volume={677},
  pages={1201 - 1215}
}
We present a detailed analysis of archival Hubble Space Telescope data that we use to measure the proper motion of the Crab pulsar, with the primary goal of comparing the direction of its proper motion with the projected axis of its pulsar wind nebula (the projected spin axis of the pulsar). We demonstrate that our measurement, using 47 observations spanning >10 yr, is robust and has an uncertainty of only ±0.4 mas yr−1 on each component of the proper motion. However, we then consider the… 

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