Shift time: 2020-04-18 01:00-09:00 JST
(a.k.a. April 17 owl shift)

Operator: YamamotoT
Co-operator: Darkhan

Control room support: Yokozawa, Miyo, Miyoki
Remote support: -

Summary

Environment:
* Seismic noise at 02:15 am due to an earthquake in India, and seismic noise around 4 am.
* mostly low oceanic noise,
* low human noise until about 7 am.

BNS range: 480-595 kpc

Duty cycle: 23.5 %

Log (all times are given in JST)

01:00 Shift started. Locked, observing with the BNS range 595 kpc.
IFO was locked for 3h 41m when the shift started.

02:15 Lost lock due to an earthquake in India. Last lock duration: 4h 56m.
Requested the DOWN state.

02:36 Requested RF lock.
02:41 Requested Observation state, and at 02:42, state TRANSIT_TO_OMCDC (400), lost lock.
Requested DOWN.

03:15 Requested RF lock.
03:20 Requested OBS.
03:23 Locked, observing. IMC output power: 4 W. BNS range: 610 kpc.

03:54 Lost lock due to an earthquake. Last lock duration: 31m.
Requested DOWN.

04:03 Requested RF lock.
04:07 Requested OBS.
04:10 Locked, observing. IMC output power: 4.2 W.
04:11 Lost lock.

04:20 Locked, observing. IMC output power: 4.2 W.
04:21 Lost lock.

05:57 Locked, observing. IMC output power: 4.2 W. BNS range: 480 kpc.
06:02 Lost lock.

08:49 Masayuki is in the control room

09:00 Shift Ended