LIGO's O3 Commissioning Break Oct 1-31

The LIGO Hanford and Livingston observatories have started a commissioning break on October 1 at 0800 PDT (1500 UTC), during which neither observatory will be operating in the observing mode. The purpose of the break is to install instrument upgrades and make repairs. The observatories will resume their operation on November 1 at 0800 PDT (1500 UTC). To preserve the 12 month O3 observing period, the end date for O3 is planned to be April 30, 2020.

More about the commissioning break at the LIGO website.

Watch the video below featuring LHO detector controls engineer Dr Jeffrey Kissel to learn how the 3rd observing run has been going and what LIGO will be doing during the commissioning break:

Video: LIGO Hanford Observatory