ALL TIMES IN UTC

Post-Maintenance: IFO is actively locking; caveat-> excess noise that wasn’t present prior to maintenance (1Hz comb and some high freq). Calibration going on. Wind calm. Seismic calm. Patrick on Evening duty.

Activity Log: Not much activity. Folks here from the day eventually left.

• 7:00 Sheila, Evan, Dan and Jenne on site doing their thing(s)

• 7:29 Got SDF cleared out except for CALCS (will remain Red with diffs)

• 7:29 Evan running excitations on H1LSC is the only thing left that is keeping H1 from Observing mode at this time

• 8:27 Added OMC whitening. Not able to set the Intent Bit

• 8:56 Evan and Sheila leaving site.

• 12:09 ETMY saturation

• 12:15 LLO dropped out of science mode

• 12:28 ETMY saturation

• 12:59 ETMY saturation (2)

• 13:45 ETMY saturation

• 13:56 Took IFO to Commissioning mode for Richard to investigate the 1Hz comb in PRCL

• 13:57 ETMY saturation (3)

• 14:04 Set OIB/OOM back to Undisturbed/Observing. Noise in PRCL successfully removed

LOCK LOG:

• 7:00 Locked at NOMINAL_LOW_NOISE

• 8:43 OIB/OOM set after Evan figured out how to clear the ODC Observation Ready bit.

Summary:

• Uneventful night. IFO locked for ~8 hours.

• ETMY saturations started to occur midway through the shift. The first small one didn’t seem to be related to typical ETMY saturations.

• Took IFO out of science mode momentarily for noise maintenance in PRCL which was remedied by Richard McCarthy.

• Handing off to Jeff B