11:25UTC Alert was recieved. LLO operator was communicated with. INJ_TRANS node was in INJECT_KILL state already.

! hr stand-down to begin now.

Time: Sun Jun 18 09:06:57 UTC 2017

Location: Iceland region; LAT: 61.0, LON: -27.8

Magnitude: 5.0

9:25 USGS/Terramon/Seismon all reporting

9:37UTC first sign on BLRMS

TITLE: 06/18 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 64Mpc
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
    Wind: 15mph Gusts, 12mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

H1 locked for 31 hrs.

TITLE: 06/18 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 67Mpc
INCOMING OPERATOR: Ed
SHIFT SUMMARY: Quiet Shift, except for a timing error
LOG:
0:00 Verbal alarms reported timing system errors, I called Dave, we looked at the timing system, but seemed to fix itself.

Jim just called me reporting corner station timing errors. I ran remote MEDMs and saw that the MSR comparator was showing a continuous out-of-nominal error for the fourth channel (Symmetricom GPS) and the Timing Master was intermittently reporting "GPS Not Locked" errors. As I was watching, the comparator channel became nominal, but the master became stuck in the not-locked state. Several minutes later the master corrected itself and the timing system has been continuously GREEN since. There was an alog early in the week about a transient timing error, I'm investigating if this is a re-occurence of the same error.

The front ends did not see any timing issues, the master's oven controlled crystal oscillator (OCXO) remained locked at all times.

Master's MEDM at time of locking error is attached.

   All quiet on the LHO front. IFO has been steady and running smoothly, with a range around 66Mpc. Environmental conditions are good. No issues or problems to report.  

TITLE: 06/17 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc 15hrs
INCOMING OPERATOR: Jeff
SHIFT SUMMARY:

Quiet shift. Nothing to report. Handing off o Jeff B
LOG:

12:57UTC PI Mode27 rung up. Switched sign on phase.

Earthquake EQ report
Mag 5.4 59km SSW of Masachapa, Nicaragua

Was it reported by Terramon, USGS, SEISMON? Yes, Yes, Yes

Magnitude (according to Terramon, USGS, SEISMON): 5.4, 5.4, 5.4

Location:   Masachapa, Nicaragua ; LAT: 11.3, LON: -86.7W

Starting time of event (ie. when BLRMS started to increase on DMT on the wall): 14:00 UTC - .4um/s

Lock status?  H1 rode it out without a problem

EQ reported by Terramon BEFORE it actually arrived? Yes

!2:25UTC Run a2l

12:33UTC H1 back to Observing

TITLE: 06/17 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 69Mpc
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
    Wind: 11mph Gusts, 10mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.13 μm/s
QUICK SUMMARY:

H1 locked and observing for ~7.5 hrs. Nothing from Jim regarding handoff. Had an encounter with our porcupine friend who startled me in the dark by taking to a tree and climbing up as I was walking up the path past the section of beam tube enclosure that shelters motorcycles. Jim and I went out and got some photos of it hanging out on a lower branch. It seemed very calm and probably wishing we would just go away. It's the first time I've seen one in the wild that wasn't road-kill. :)

TITLE: 06/17 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc
INCOMING OPERATOR: Ed
SHIFT SUMMARY: Lock all shift, Sheila did some tweaks that have our range up.
LOG:
23:00 LLO is down, Sheila does some stuff ( I never got any detail...) & wind is coming down so range so range improves from a ratty < 60 Mpc to almost 70 Mpc

1:00 Evan Goetz turns off some high frequency cal lines.

While LLO was down we took a few minutes to continue the POP spot scan that I started yesterday. (36920)  I left the spot in the lower jitter location.  

• The first attached screenshot shows the improvement in the DARM spectrum and the DCPD cross correlation from today's POP move. It appears that the NS range is about 10 Mpc better, but the seismic environment is also changing.(EQ arriving, winds dying down).
• I downloaded data from 6 times when I moved the POP position in the last two days, and took spectra every 20 seconds during the moves. The second attachment gives you an idea of the variety of spectra we can get by moving the position, the color scale is set so that a spectra taken when POP A pit was 1 would be red, and a spectra taken at +- would be green. The same plot for yaw is less dramatic. 
• The third attached plot shows the recycling gain, and the strain rms around 400 Hz (which is dominated by the noise which is coherent with the bullseye), plotted against the position on POP A.  During todays short commissioning break we started roughly in the center of the QPD and moved to 0.15 in pit and -0.2 in YAW.  We may be able to reduce the broad jitter coupling to DARM further by moving further in this direction, at the cost of somewhat lower recycling gain. 
• The 4th attachment is a similar plot but allows you to compare the broad jitter peak (RMS around 500 Hz) to one of the jitter peaks that is from a structure on the PSL and best seem using the IMC WFS DC.  The spot position which is best for the braod jitter isn't the same as what is best for the peak.
• In the 3rd and 4th plots you can see that in different locks, we got different results for similar POP positions for both PR gain and the strain RMS.  We are trying to use the QPD in loop to keep our jitter coupling and PR gain the same from lock to lock.  At LLO, they have used a dither on PR2 or PR3 instead of the POP QPD for this degree of freedom, because they had seen clipping on the POP QPD path.  The third attachment shows that we do not have clipping in this path, with a scatter plot of the normalized POP A and POP B sums vs recycling gain. We might want to think about trying the dither anyway.

We have made A2L measurements at some of these points and this data can be added to these plots.

Along with Jenne's suggestion, I renewed the IR transmission common mode screen. The previous screen (3rd attachment) was not compact and had verious confusing features. The new screen (2nd attachment), LSC_CUST_TR_COMMON.adl, shows the signal flow in a better way. It is linked from LSC_OVERVIEW screen (1st attachment). It can eventually replace LSC_CUST_TRPD.adl file.

BTW, the signal flow was diagramed and uploaded to DCC as E1700204.

Evan G., Pep C.

We identified the 5950 Hz line as the culprit of the 86 Hz line that was recently found as a new line appearing in DARM.

During the period in which Sheila moved the spot positions, we made some adjustments to the 5950 Hz line--moved higher in frequency by 1 Hz and observed the 86 Hz line to move down to 75 Hz and changed the amplitude to a smaller value to see the 86 Hz line vanish from the TX PD channels and DARM--so we decided this line should be moved or turned off.

Rick consulted Sudarshan who agreed that we can turn off this line (Keita approved us dropping from observing for 2 minutes to make this change), so it was done today at ~1:10 June 17 UTC.

The 86 Hz line is now no longer appearing in the TX PD or DARM channels.

FYI: Virgo's range plots can currently be obtained from LDAS (upper right hand plot shows all 3 IFOs)

Greg is looking into why the latest data seems to be a bit behind. We are working with John Z on adding the V1 range plot to the wall display in the control room.