The HARPS search for southern extra-solar planets IX. Exoplanets orbiting HD 100777, HD 190647, and HD 221287

@article{Naef2007TheHS,
  title={The HARPS search for southern extra-solar planets IX. Exoplanets orbiting HD 100777, HD 190647, and HD 221287},
  author={Dominique Naef and Michel Mayor and W. Benz and François Bouchy and Gaspare Lo Curto and Christophe Lovis and Claire Moutou and Francesco A. Pepe and Didier Queloz and Nuno C. Santos and St{\'e}phane Udry},
  journal={Astronomy and Astrophysics},
  year={2007},
  volume={470},
  pages={721-726}
}
Context. The HARPS high-resolution high-accuracy spectrograph was made available to the astronomical community in the second half of 2003. Since then, we have been using this instrument for monitoring radial velocities of a large sample of Solar-type stars ($\simeq$1400 stars) in order to search for their possible low-mass companions. Aims. Amongst the goals of our survey, one is to significantly increase the number of detected extra-solar planets in a volume-limited sample to improve our… 

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