Abstract
Recently the Virgo and the LIGO collaborations simultaneously announced the first direct detection of gravitational waves [1]. Besides directly confirming a key prediction of General Relativity 100 years after its formulation, interferometric gravitational wave detectors demonstrated to be a new tool for astronomy, astrophysics and cosmology. The challenging achievement to detect strain changes at the 10−23 level require a combination of state of the art technologies for sensitive optical sensing and for isolation form environmental disturbances. In this paper we summarise the apparatus of Advanced Virgo to describe the interferometric detection of gravitational waves. We provide an overview of the interferometer configuration, and a summary of the sensitivity limits.
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