Time frequency representation of strain data from Hanford and Livingston detectors (top two panels) at the time of GW170104.  The data begin at 167559936.5 GPS time. The third panel from top shows the time-series data from each detector with a 30-350 Hz bandpass filter, and band-reject filters to suppress strong instrumental spectral lines. The Livingston data have been shifted back by 3 ms to account for the source's sky location, and the sign of its amplitude has been inverted to account for the detectors' different orientations. The maximum-likelihood binary black hole waveform given by the full-precession model is shown in black. The bottom panel shows the residuals between each data stream and the maximum-likelihood waveform.
This W3C-unspecified plot was created with Matplotlib.
LIGO Scientific and Virgo Collaboration