DQ Shift: LHO during June 3rd, 2019 0:00 UTC - June 9th, 2019 23:59:59 UTC (1243555218-1244160017)
https://wiki.ligo.org/DetChar/DataQuality/DQShiftLHO20190603

Whistles continue to show up most days when strong ground motion is present, especially in 0.03-0.1 Hz band. Previous studies have tied this to greater variance in the VCO frequency when ground motion is present. Whistles (RF beatnotes) hurt some transient analyses and would be a good thing to get fixed.

There were two observed instances of Parametric Instability modes Thursday and Friday (see alogs 49698 and 49743). The first of these caused a lockloss and a very fake but very spectacular-looking temporary increase in the reported binary neutron star inspiral range.

The 48 Hz line and its harmonics showed up prominently in first half of UTC day Thursday. 96 Hz in particular showed up prominently in the omicron gltichgram and had a modest observed impact on coherent WaveBurst online background.

On Friday, around 40 squeezer channels were added to the H1 configuration file used for omega scans and omicron trigger production. Any new appearances of squeezing channels in hveto or scans therefore might be the result of a new configuration in detchar tools rather than a change in the instrument.

Hveto roundup: LSC-POP_A_LF and LSC-REFL_A_LF are, as ever, the most prominent hveto winners as witnesses of loud glitching and whistles. Some deeper cuts are significantly correlated with low frequency noise, however, including H1:LSC-POP_A_RF9_Q_ERR_DQ as Round 2 on June 5th, H1:LSC-REFL_A_RF45_Q_ERR_DQ as Round 2 on June 6th and H1:ASC-SRC2_Y_OUT_DQ as Round 3 on June 8th.

Overall weekly duty cycle was 79.4%, including 100% observing Saturday. ~108 Mpc characteristic range at the start of the week increased to ~114 Mpc by the weekend.