@misc{benedict2008astrometry,
  title={HST FGS astrometry - the value of fractional millisecond of arc precision},
  author={G. Fritz Benedict and Barbara E. McArthur and Jacob L. Bean},
  year={2008},
  eprint={0803.0296},
  archivePrefix={arXiv},
  primaryClass={astro-ph},
  url={https://arxiv.org/abs/0803.0296}
}