We report the discovery of a tight substellar companion detected with high contrast adaptive
optics imaging as part of the Gemini NICI Planet-Finding Campaign. The companion was
detected at a projected separation of 0.360±0.003''. Second-epoch observations a year later
demonstrate that the companion is not a background star and that it shows significant orbital
motion. The near-IR colors of the companion indicate a spectral type of M7±2 and thus this
object will be a new benchmark companion for studies of ultracool, low-gravity …

We report the discovery of a tight substellar companion to the young solar analog PZ Tel, a
member of the β Pic moving group observed with high-contrast adaptive optics imaging as
part of the Gemini Near-Infrared Coronagraphic Imager Planet-Finding Campaign. The
companion was detected at a projected separation of 16.4±1.0 AU (0 farcs 33±0 farcs 01) in
2009 April. Second-epoch observations in 2010 May demonstrate that the companion is
physically associated and shows significant orbital motion. Monte Carlo modeling constrains …