Link to full report

• Duty cycles (Observing): 0%, 6.23%, 85.64%, 65.05%, 61.33%, 85.86%, 86.28% on the 7 days of the week.
• The range stayed between 145 Mpc and 155 Mpc during most of the observing time. Most brief dips in average range throughout the day appear to correspond to loud glitches (SNR>=10) in the glitchgrams.
• Day-wise short reports:
  • On Monday, IFO was down for corrective maintenance, so there was no data.
  • On Tuesday, IFO was in observing mode for ~ 1.5 hrs. Lockloss was intentional in order to avoid potential harmful locklosses and other issues.
  • On Wednesday, IFO was locked most of the time. H1 SQZ briefly caused the IFO to drop out of Observing in the last one hour. Seismically, there were a couple of EQs which required EQ Mode, but H1 rode right through them.
  • On Thursday, IFO lost lock because of EQ around 15:30 UTC.
  • On Friday, lockloss from Thursday continued. In addition, there were 3 more periods of locklosses throughout the data.
  • On Saturday, there were three locklosses.
  • On Sunday, there was one lockloss.
• The common Hveto channels are the following:
  • H1:ASC-X_TR_B_NSUM_OUT_DQ appears on 3 days - Tuesday (round 2), Thursday (round 3) and Sunday (round 2).
  • H1:ASC-Y_TR_A_NSUM_OUT_DQ appears on 2 days - Friday (round 1) and Saturday (round 1)
• Fscan-Observing: No Fscan on Monday and Tuesday due to absence/lack of data. On Wednesday, the number of lines was close to the alert threshold but still below it. The line count dropped to a minimum on Friday (~ 2420) after which it rose to a maximum on Sunday.

Sheila, Camilla

We had wanted to turn down the CLF launch power to see if ti had any effect on SQZ noise, but couldn't turn down by a factor of 2. Could only reduce from 0.06 to 0.05. We instead we doubled CLF launch from 0.06 to 0.12mW. Note these numbers were when the OPO was unlocked and the CLF launched changed once it was locked.

After changing the settings attached, ran scan_sqz_ang which only changed angle by 2deg. I don't see any extra noise at low frequeuncy. See attached, SQZ was a little worse at high frequency with the higher CLF. Not that the CLF RF6 was noisy, so maybe something was setup incorrectly.

To relock in the nominal settings, I had to realign ZM3 as the FC ASC had moved this away after the test when the SQZ was taken down, unsure why, maybe the way that I changed the ASC settings.

FAMIS 37209, last checked in alog86426

Last month of trends seem to be looking as expected.

FAMIS 31104

In general, things in the PSL are looking good after everything done following the power outage a couple weeks ago. There have been a few incursions in the PSL enclosure over the past week, the most consequential being last Tuesday's FSS path tuneup (alog86972). The biggest difference after that is the reading of the FSS TPD (a gauge of RefCav transmission) is now much lower as a result of recalibrating that PD, so this new reading of ~0.54 V can be considered our new "good" level.

ISS diffracted power has been on the rise for some reason; I'll keep an eye on this and check it when H1 is next out of lock. This could be a result of AMP2 output power having come back up slightly after the last incursion and things settling out.

Overnight we had the ifo drop out of Observing briefly between 2205-09-22 08:23 and 08:27 UTC. This was due to the SQZ PMC PZT running out of range and unlocking. It was able to relock by itself and then get back to FDS

We have had a few FOM and workstation problems where the window manager had died.  This leaves the windows with a border/titlebar/min max buttons/...  In this situation you are unable to move the windows and new windows pile up on top of each other.

This is fixable.

1. get to a terminal window

2. run xfwm4

    * This is the window manager that we us in the control room

    * With this running you should be able to manipulate windows again

3. log out and log back in to maek sure things have cleared up.

** Note you may also need to do a xfwm4 --relplace first, but that is not certain.

Lockloss at 2025-09-22 14:43 UTC after just over 4.5 hours locked due to earthquake. I took us to ASC Hi Gains once we were passing 700 on peakmon, and it fully transitioned over, but it was still too much movement for the ASC to handle

TITLE: 09/22 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 34Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
   SEI_ENV state: CALM
   Wind: 4mph Gusts, 2mph 3min avg
   Primary useism: 0.03 μm/s
   Secondary useism: 0.28 μm/s  
QUICK SUMMARY:  Observing at 153 Mpc and have been Locked for 4.5 hours.

TITLE: 09/22 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: One lockloss with a long recovery, DRMI really didn't want to lock despite having pretty decent flashes after doing an alignment. The winds were moderate starting around 21:00 UTC, and were even worse from 00:00 to 01:00 UTC esp on YARM. We've been lock for a little over an hour.
LOG: No log.

• 23:51 UTC lockloss
  • 01:09 UTC initial alignment
  • Several ALS, IR, DRMI locklosses from the wind
  • 03:16 UTC DRMI finally locks
  • 03:57 UTC Observing

21:51 UTC lockloss

TITLE: 09/21 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 30mph Gusts, 23mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.28 μm/s
QUICK SUMMARY:

• We've been locked almost 19hours
• The wind has picked up over the last 3 hours
• Secondary micreoseism is staying constant in between the 90th and 50th percentiles.

TITLE: 09/21 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 152Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY:

Observing and have been Locked for almost 19 hours. Quiet day Observing my entire shift.

LOG:

14:30 UTC Observing and have been Locked for 10.5 hours
    20:45 - 20:47 Helicoptor flying overhead Tagging detchar

Sun Sep 21 10:09:04 2025 INFO: Fill completed in 9min 0secs

TITLE: 09/21 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.22 μm/s
QUICK SUMMARY:

Obsrving at 150 Mpc and have been Locked for almost 11 hours. Secondary microseism is sitting a bit high but is stable.

TITLE: 09/21 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: One lockloss, there was a high state lockloss on the way back up. We've been locked for just under an hour.
LOG: No log.

• 01:06 UTC lockloss
  • 01:39 - 01:49 UTC Earthquake mode from a 5.7 from Eastern Russia.
  • 02:29 UTC Transition_from_etmx lockloss
  • 03:07 Initial alignment
  • 04:15 UTC Observing

01:06 UTC lockloss

At the time of starting the calibration suite, we had been locked for 8.5 hours and so were fully thermalized.

Calibration monitor screen

Report (found at /ligo/groups/cal/H1/reports/20250920T183850Z/H1_calibration_report_20250920T183850Z.pdf

Broadband
2025-09-20 18:32:12 - 18:37:23 UTC
/ligo/groups/cal/H1/measurements/PCALY2DARM_BB/PCALY2DARM_BB_20250920T183212Z.xml

Simulines
2025-09-20 18:38:50 - 19:02:14 UTC
/ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20250920T183850Z.hdf5
/ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20250920T183850Z.hdf5
/ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20250920T183850Z.hdf5
/ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20250920T183850Z.hdf5
/ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20250920T183850Z.hdf5