O4 Data Sets
Please Read This First! Click for data usage notes.
The LIGO Laboratory's Data Management Plan describes the scope and timing of LIGO data releases.
O4a Data Release
O4a Time Range: May 24, 2023 through January 16, 2024
Additional data segments: May 15, 2023 through May 19, 2023
Detectors: H1, L1
O4b Data Release
O4b Time Range: Apr 10, 2024 through January 28, 2025
Additional data segments (ER16): Apr 6, 2024 through Apr 10, 2024
Detectors: H1, L1, V1