Interferometric Astrometry of Proxima Centauri and Barnard's Star Using HUBBLE SPACE TELESCOPE Fine Guidance Sensor 3: Detection Limits for Substellar Companions*

@article{Benedict1999InterferometricAO,
  title={Interferometric Astrometry of Proxima Centauri and Barnard's Star Using HUBBLE SPACE TELESCOPE Fine Guidance Sensor 3: Detection Limits for Substellar Companions*},
  author={G. Fritz Benedict and Barbara E. Mcarthur and D.W.G. Chappell and Edmund P. Nelan and William H. Jefferys and Wm. F. van Altena and J.Lee and David Elbaz Cornell and Peter John Shelus and Paul D. Hemenway and Otto G. Franz and Lawrence H. Wasserman and Raynor Lockwood Duncombe and Darrell B. Story and Arthur L. Whipple and L.W.Fredrick},
  journal={The Astronomical Journal},
  year={1999},
  volume={118},
  pages={1086-1100}
}
We report on a substellar-companion search utilizing interferometric fringe-tracking astrometry acquired with Fine Guidance Sensor 3 on the Hubble Space Telescope. Our targets were Proxima Centauri and Barnard's star. We obtain absolute parallax values of πabs = 07687 ± 00003 for Proxima Cen and πabs = 05454 ± 00003 for Barnard's star. Once low-amplitude instrumental systematic errors are identified and removed, our companion detection sensitivity is less than or equal to one Jupiter mass for… 
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MICROLENSING EVENTS BY PROXIMA CENTAURI IN 2014 AND 2016: OPPORTUNITIES FOR MASS DETERMINATION AND POSSIBLE PLANET DETECTION*
We have found that Proxima Centauri, the star closest to our Sun, will pass close to a pair of faint background stars in the next few years. Using Hubble Space Telescope (HST) images obtained in 2012
A candidate super-Earth planet orbiting near the snow line of Barnard’s star
TLDR
Analysis of 20 years of observations of Barnard’s star from seven facilities reveals a signal with a period of 233 days that is indicative of a companion planet, and a long-term modulation that could arise from a stellar magnetic-activity cycle or from a more distant planetary object is revealed.
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We have observed Proxima Centauri and Barnard's star with the Hubble Space Telescope Fine Guidance Sensor 3. Proxima Cen exhibits small-amplitude, periodic photometric variations. Once several
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