kentaro.mogushi@LIGO.ORG - posted 13:47, Thursday 27 July 2017 (37817)
Fellow shift summary during Monday 24th 00:00 UTC - Wednesday 26th 23:59 UTC
LHO fellow: Kentaro Mogushi
The duty cycle was 95.6% on Monday, 36.0% on Tuesday and 27.9% on Wednesday, 53.2 in overall. The range was around 55 Mpc over three days.
On Monday, the range was degrading slightly and had many dips while glitches appeared between 10Hz and 30Hz during before 10:00UTC, this is maybe because of the wind. Then, glitches in PCAL X showed up after the lockloss at 10:16UTC which is due to unknown cause.
On Tuesday, the lockloss occured at at 9:10UTC, then we had a trouble with OMC DCPD saturations after the lockloss. But we were mainly fighting against violin modes.
On Wednesday, we succeeded damping violin modes around 5:40UTC and went back to observing. RF45 glitches appeared around 10:00UTC. Then, we lost lock around 11:00UTC probably due to the earthquake for Japan and we had violin modes again.
Apart from that, we had GRB alerts at 00:50 UTC and 13:03UTC on Monday, 05:59UTC on Wednesday.
