High-precision stellar parallaxes from Hubble Space Telescope fine guidance sensors

  title={High-precision stellar parallaxes from Hubble Space Telescope fine guidance sensors},
  author={G. Fritz Benedict and Barbara E. Mcarthur},
  journal={Proceedings of the International Astronomical Union},
  pages={333 - 346}
We describe our experiences with on-orbit calibration of, and scientific observations with, the Fine Guidance Sensors (FGS), white-light interferometers aboard Hubble Space Telescope. Our original goal, 1 milliarcsecond precision parallaxes, has been exceeded on average by a factor of three, despite a mechanically noisy on-orbit environment, the necessary self-calibration of the FGS, and significant temporal changes in our instruments. To obtain accurate absolute parallaxes from these small… 


in Allen''''s Astrophysical Quantities
A support for use in conjunction with self-coiling indicia-carrying sheets in a movable indicia display utilizes two identical backing members, and two identical end members, a total of only four
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