Image Details
GW230814: Investigation of a Loud Gravitational-wave Signal Observed with a Single Detector
A. G. Abac et al 2026 The Astrophysical Journal Letters 1004 .
Caption: Figure 1.
Time–frequency representation (top) and whitened time-domain strain with Bayesian reconstructions (bottom) from LIGO Livingston observations of GW230814. Time is measured relative to GPS time tLLO = 1376089759.805280 s. The top panel shows the time–frequency representation of the whitened strain data, obtained using a continuous wavelet transform (CWT) with a Morlet–Gabor wavelet. The color scale represents the amplitude of the CWT coefficients, in units of seconds. The bottom panel displays the whitened strain data (gray) alongside 90% credible intervals from waveform reconstructions using the NRSUR7DQ4 (NRSur) model (blue) and the wavelet-based BayesWave algorithm (purple). The data are high-pass filtered at 20 Hz and downsampled to 1024 Hz in both panels.
© 2026. The Author(s). Published by the American Astronomical Society.