THE LICK–CARNEGIE EXOPLANET SURVEY: A 3.1 M⊕ PLANET IN THE HABITABLE ZONE OF THE NEARBY M3V STAR GLIESE 581

@article{Vogt2010THELE,
  title={THE LICK–CARNEGIE EXOPLANET SURVEY: A 3.1 M⊕ PLANET IN THE HABITABLE ZONE OF THE NEARBY M3V STAR GLIESE 581},
  author={Steven S. Vogt and R. Paul Butler and Eugenio Jose Rivera and Nader Haghighipour and Gregory W. Henry and Michael H. Williamson},
  journal={The Astrophysical Journal},
  year={2010},
  volume={723},
  pages={954 - 965}
}
We present 11 years of HIRES precision radial velocities (RVs) of the nearby M3V star Gliese 581, combining our data set of 122 precision RVs with an existing published 4.3-year set of 119 HARPS precision RVs. The velocity set now indicates six companions in Keplerian motion around this star. Differential photometry indicates a likely stellar rotation period of ∼94 days and reveals no significant periodic variability at any of the Keplerian periods, supporting planetary orbital motion as the… 

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TLDR
Reexamination of the radial velocity signals from a famous exoplanet system demands demotion of terrestrial candidates, as well as measuring stellar activity using the Hα line, which greatly diminishes the signal of GJ 581d while significantly boosting the signals of the other known super-Earth planets.
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