Gravity is a four way beam combination second generation
instrument for the VLTI. Its main operation mode makes use of
all four 8m Unit Telescopes to measure astrometric distances
between objects located within the 2” field-of-view of the VLTI.
With the sensitivity of the UTs and the ~10μas astrometric
precision, it will allow to measure orbital motions within the
galactic center with unprecedented precision. Other modes of the
instrument will allow imaging and the use of the 1.8m Auxiliary
Telescopes. |Principle Investigator||Frank Eisenhauer| The
Gravity consortium: |Instrument Scientist and Work Package
Manager||Markus Schöller| |Project Manager||Lieselotte Jochum|
|ESO Science Advistory Team||Olivier Absil (Liege), Hans-Ulrich
Käufl (ESO, chair), Mario Lattanzi (Torino), Fabien Malbet
(Grenoble), Ralph Neuhäuser (Jena), Huub Rottgering (Leiden)
|Project Milestones||Kick-Off July 2008, PDR December 2009, FDR
October 2011| GRAVITY will carry out the ultimate empirical test
to show whether or not the Galacti