Periodic Hαvariations in GL 581: Further evidence for an activity origin to GL 581d

Comment on "Stellar activity masquerading as planets in the habitable zone of the M dwarf Gliese 581"

(2015) G. Anglada-Escude et al.   SCIENCE

GJ 581 update: Additional evidence for a Super-Earth in the habitable zone

(2014) S.S. Vogt et al.   ASTRONOMISCHE NACHRICHTEN

Stellar activity masquerading as planets in the habitable zone of the M dwarf Gliese 581

(2014) P. Robertson et al.   SCIENCE

The impact of red noise in radial velocity planet searches: only three planets orbiting GJ 581?

(2013) R. V. Baluev   MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

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

(2010) Steven S. Vogt et al.   ASTROPHYSICAL JOURNAL

The HARPS search for southern extra-solar planets

(2009) M. Mayor et al.   ASTRONOMY & ASTROPHYSICS