thomas.shaffer@LIGO.ORG - posted 16:27, Wednesday 23 July 2025 (85934)
Ops Day Shift End
TITLE: 07/23 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: Two lock losses and a longer recovery for the second thanks to an earthquake. We are on our way back right now, locking DRMI.
LOG:
- 1313 GRB E583131 - Fermi 774969189
- 1446 GRB E583144 - Fermi 774974742
- 1815 Lock loss - 1437329730
- 1945 Observing
- 2057 Lock loss - 1437339457
- Not the cause of the lock loss, but an earthquake rolled in just after reacquisition started and delayed that process.
- Once the ground motion settled we tried locking for ~1 hour with DRMI unsuccessfully. Ended up running an initial alignment even though we had many good looking flashes.
- During initial alignment, had to intervene and move SRM in yaw for SRY to catch.
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 21:06 | SAF | LVEA IS LASER HAZARD | LVEA | Y | LVEA IS LASER HAZARD | 22:03 |
| 16:15 | CDS | Fil, Marc | MY | n | Pick up from H2, drop off at MY | 16:52 |
| 17:14 | - | Betsy | Opt Lab | n | Parts and such | 17:43 |
| 20:13 | - | Randy | EX | n | Checking in lab space | 20:49 |