DQ Shifter: Brennan Hughey

Summary:

• 36% observing time over the week, with PEM week and other site activities the limiting factor Mon-Thu and earthquakes the limiting factor Fri-Sun.  While there was a lot going on this week, data quality within observing periods actually appears pretty clean for the start of a run, at least from a transient analysis perspective.
• GDS and front-end calibrations visibly match better in the range plots after O4 calibration is pushed, though not at the start of each lock.
• The mid-frequency 50-100 Hz glitching Derek identified last week shows up Monday and Tuesday in the omicron glitchgrams, but with reduced severity.  Didn't reappear the rest of the week.
• Some good things for DetChar to note: the 10 Mpc range increase when HVAC system is turned off, the lockloss due to parametric instability, the wind fence button. 
• Astrophysics:
  • Jenne fixed a squeezer issue and got LHO back into observing 3 minutes before detection of the NSBH candidate.  Thanks Jenne.
  • SN 2023ixf is the closest core-collapse supernova in over a decade.  While it was first identifed 17:27 UTC May 19 the relevant times for GW analysis are hours to days before that (and a current subject of discussion).  My point here is that the burst group is going to be serious about analyzing some of the engineering run data this week. 
• Full report contains notes on individual DQ shift monitoring tools, including some settings we should probably tweak going into O4.

The full report can be found here.