English: Spectrograms and waveforms for the gravitational-wave transient catalog. The insets of this image show the gravitational waveform (bottom) and time-frequency spectrogram for each confident detection in the gravitational-wave transient catalog. The spectrogram color indicates a measure of signal strength; the increase of signal frequency with time clearly shows the characteristic "chirp" signature of a binary inspiral. The waveforms shown at the bottom of each panel are produced from either a range of models based on Einstein's theory (orange) or a wavelet decomposition of the observed signal (gray).