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GRAVITY: getting to the event horizon of Sgr A*
[article]
2008
arXiv
pre-print
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
arXiv:0808.0063v1
fatcat:mufrft3buvhvtfgyeuog6zefce