Current Observing Plans
January 16, 2024 -- The first half of O4 (O4a) ended on January 16th when LIGO entered its scheduled O4 maintenance and commissioning break, which is expected to last approximately 8 weeks. The second half of the run is currently expected to begin on March 27, 2024 following a 2-week engineering run.
For more information, please see:
Future Observing Plans
Plans are currently under development by LIGO to chart a path for interferometer upgrades and observing periods beyond O5 and continuing into the next decade.