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A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436
Paul Butler, Steven S. Vogt, Geoffrey W. Marcy +5
We report precise Doppler measurements of GJ 436 (M2.5V) obtained at Keck Observatory. The velocities reveal a planetary companion with orbital period of 2.644 d, eccentricity of 0…
A Hot Saturn Planet Orbiting HD 88133, from the N2K Consortium
D. A. Fischer, G. Laughlin, R. P. Butler +20
The N2K consortium is carrying out a distributed observing campaign with the Keck, Magellan and Subaru telescopes, as well as the automatic photometric telescopes of Fairborn Obser…
The GJ 876 Planetary System -- A Progress Report
G. Laughlin, R. P. Butler, D. A. Fischer +3
We present an updated analysis of the GJ 876 planetary system based on an augmented data set that incorporates 65 new high-precision radial velocities obtained with the Keck telesc…