First light for GRAVITY: Phase referencing optical interferometry for the Very Large Telescope Interferometer
First light for GRAVITY: Phase referencing optical interferometry for the Very Large Telescope Interferometer
GRAVITY is a new instrument to coherently combine the light of the European Southern Observatory Very Large Telescope Interferometer to form a telescope with an equivalent 130 m diameter angular resolution and a collecting area of 200 m$^2$. The instrument comprises fiber fed integrated optics beam combination, high resolution spectroscopy, …