24 May 2023 — Today the LIGO-Virgo-KAGRA (LVK) Collaboration begins a new observing run with upgraded instruments, new and even more accurate signal models, and more advanced data analysis methods.
This observing run, known as O4, promises to take gravitational-wave astronomy to the next level. O4 will begin on May 24th and last 20 months, including up to two months of commissioning breaks. It will be the most sensitive search yet for gravitational waves. LIGO will resume operations on May 24th, while Virgo will join later in the year. KAGRA will join for one month, beginning May 24th, rejoining later in the run after some upgrades.
The LIGO detectors will begin O4 approximately 30% more sensitive than before. This increased sensitivity will result in a higher rate of observed gravitational-wave signals, resulting in a detection of a merger every 2 or 3 days.
For more details read the full news item.