Gravitational waves as the unique ultra-wideband process

Abstract

The results of system spectral analysis of the unique registration of the gravitational waves generated by a binary black hole merger were proposed. On September 14, 2015 at 09:50:45 UTC two detectors of the Laser Interferometer Gravitational-Wave Observatory placed in the United States simultaneously observed a transient gravitational-wave signal. These were the first direct detection of gravitational waves and the first direct observation of a binary black hole system merging to form a single black hole. Using the system spectral analysis method, the time-frequency structure of the gravitational wave signal was investigated in detail. This signal was found to be classified as an ultra-wideband process with changing mean frequency.