GRAVITY: getting to the event horizon of Sgr A*

  title={GRAVITY: getting to the event horizon of Sgr A*},
  author={F. Eisenhauer and G. Perrin and W. Brandner and C. Straubmeier and A. Richichi and S. Gillessen and J. Berger and S. Hippler and A. Eckart and M. Sch{\"o}ller and S. Rabien and F. Cassaing and R. Lenzen and M. Thiel and Y. Cl{\'e}net and J. Ramos and S. Kellner and P. F{\'e}dou and H. Baumeister and R. Hofmann and E. Gendron and A. Boehm and H. Bartko and X. Haubois and R. Klein and K. Dodds-Eden and K. Houairi and F. Hormuth and A. Gr{\"a}ter and L. Jocou and V. Naranjo and R. Genzel and P. Kervella and T. Henning and N. Hamaus and S. Lacour and U. Neumann and M. Haug and F. Malbet and W. Laun and J. Kolmeder and T. Paumard and R. Rohloff and O. Pfuhl and K. Perraut and J. Ziegleder and D. Rouan and G. Rousset},
  booktitle={Astronomical Telescopes + Instrumentation},
We present the second-generation VLTI instrument GRAVITY, which currently is in the preliminary design phase. GRAVITY is specifically designed to observe highly relativistic motions of matter close to the event horizon of Sgr A*, the massive black hole at center of the Milky Way. We have identified the key design features needed to achieve this goal and present the resulting instrument concept. It includes an integrated optics, 4-telescope, dual feed beam combiner operated in a cryogenic vessel… Expand
Dimensioning adaptive optics for future VLTI projects
The Very Large Telescope Interferometer: an update
An integrated optics beam combiner for the second generation VLTI instruments
The cryostat for the GRAVITY beam combiner instrument at the VLTI
Does Sgr A* Have an Event Horizon or a Magnetic Moment?
Mid-infrared guided optics: a perspective for astronomical instruments.


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Optomechanical design of the spectrometers of GRAVITY
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