English: The GW event GW190521 observed by the LIGO Hanford (left), LIGO Livingston (middle), and Virgo (right) detectors. Times are shown relative to May 21, 2019 at 03:02:29 UTC. The top row displays the time-domain detector data after whitening by each instrument’s noise amplitude spectral density (light blue lines); the point estimate waveform from the CWB search (black lines); the 90% credible intervals from the posterior probability density functions of the waveform time series, obtained via Bayesian inference (LALInference) with the NRSur7dq4 binary BH waveform model (orange bands), and with a generic wavelet model (BayesWave, purple bands). The ordinate axes are in units of noise standard deviations. The bottom row displays the time-frequency representation of the whitened data using the Q transform.