ALL TIMES IN UTC

Science Mode Checklist: (beginning of shift)

• Guardian:  NOMINAL_LOW_NOISE

• Inspiral Range: 62Mpc

• LVEA Sweep: N/A

• Ops Overview: Clean and Green (except for the beam diverter caveat)

• CDS Overview: Green except for Cal injections

• SDF Overview: All Diffs cleared except for  SUSPRM, OMC  and CALCS.

• SYS DIAG:  the usual BRS message

• Calibration Lines: Calibrations are running.

• ODC Master Observation Ready Bit: GREEN

• Observation Intent Bit: UNDISTURBED

• Ops Observatory Mode: Observing

Activity Log:

• 12:10 EY .3µ Dust Alarm Major

• 12:21 EY .3µ Dust Alarm Major

• 12:22 Set the Observation mode to ‘Environment’ while the earthquake settles down

• 12:26 Christina on site

• 12:26 Muted annoying EY dust monitor alarm

• 12:45  Took ISC_LOCK to down while Z-axis settles. Incessant OMC DCPD saturation Verbal Alarm after Lockloss and OMC still flashing. I called Evan and he instructed me to slide the ‘OFFSET’ slider in the OMC CONTROL Screen to the left a bit until the flashing stops. Guardian will touch this again when it’s time for locking. Verbal Alarm for this should be addressed as it was sounding excessively for an innocuous event according to Evan.

LOCK LOG:

• 11:42 IFO Locked at NLN. Range ~62Mpc.

• 11:59 Observation Intent Bit and Observatory Mode set

• 12:07 Lockloss.  There appears to be a mag 5 earthquake in the North Pacific off the coast of Russia

• 12:08  Begin locking sequence

  • DRMI - may take a while. mag 5 quake N Pacific/Russia

    • DRMI 1F locked after 15 minutes but came unlocked. I’m pretty sure it was the earthquake now

• 12:32 DRMI LOCKED

• 12:32 Attempt to proceed failed

• 12:57 Begin sequence (EQ calming) we’ll shoot for DRMI for starters.

  • DRMI Locked 1F in about 2 minutes

• 13:02 Lockloss. Never made it to 3F.

• 13:03 Begin sequence

  • DRMI Locked 1 min

• 13:19 Locked at NOMINAL_LOW_NOISE. 62Mpc

• 13:28 Set OIB and OOM to Undisturbed/Observing

Shift Summary:

• Most of the night was spent commissioning to resolve a problem with stability at “high” power.

• locking resumed at 11:42UTC and went well until an earthquake off the coast of Russia shook things up for about 1.5 hours.

• The wind stayed down all night and another good lock was achieved and hopefully will hold as I hand off to Jeff B. Only 1 ETMY saturation noted during this last lock, so far.