Discovery of Gravitational Waves
by Nicolas Leroy (LAL)
at Amphi Recherche
During the first scientific run of the new generation of gravitational wave detectors, the two LIGO instruments registered two events consistent with gravitational wave emission by the merger of two black holes. The reconstructed waveforms of the signals show that the systems were located at a distance of few hundreds Mpc, and were constituent masses of tens of M_sun and few M_sun were radiated in gravitational wave emission. These detections, 100 years after its theoretical prediction and after 50 years of experimental quest, opens a new way to observe powerful astrophysical sources. In this talk I will describe shortly the detectors and the main information we obtain from these observations.