Link to DQ Shift Summary

• The duty cycle for this week was 54.9%
• h(t) spectrograms were showing continuous high amplitude noise around 140Hz for all the days. 
• Seismic, wind and ground motion remained relatively low with some occasional exceptions being here and there, which cause noise in the PEMs. 
• Glitchgram showed large amount of high SNR glitches for some days with increase in glitch rate. 
• Corner BSC2 [Y[ chamber experience very high amplitude noise at below 10 hz continuously for all days. 
• FScan plots were available except for Sunday, June 29 with the line count remaining at around 2400 well below the threshold.

TITLE: 06/29 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 12mph Gusts, 5mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.05 μm/s
QUICK SUMMARY:

IFO is in NLN and OBSERVING since 19:42 UTC (3.5 hr lock)

Ryan C reports a very calm shift with the only comment that he had to run 2x initial alignments. I had to do this also a few days ago despite good DRMI flashes.

TITLE: 06/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY: One lockloss, I had to run 2 alignments to get DRMI to lock.
LOG: No log.

• 16:25 UTC PI24 rang up but was successfully damped back down.
• 16:38 UTC lockloss
  • 17:16 UTC I ran an alignment after not being able to get PRMI
  • Still couldn't lock DRMI or PRMI despite having good flashes around 100
  • 18:32 UTC trying another alignment
  • DRMI locked quickly now, I also adjusted the OPO temp while relocking
  • 19:42 UTC Observing

Sun Jun 29 10:13:36 2025 INFO: Fill completed in 13min 32secs

16:38 UTC lockloss

TITLE: 06/29 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 2mph Gusts, 0mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

• We've been locked for just under 14hours!
  • 2 superevents overnight
• Low wind, low microseism
• The range has dipped a little bit over the past ~3 hours, seems SQZ related

TITLE: 06/29 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

IFO is in NLN and OBSERVING as of 00:40 UTC (4 hr lock)

A very calm shift in which we were able to lock fully automatically following an ETM Glitch Lockloss at the beginning of the shift (alog 85413). Otherwise, our range has remained mostly steady.

We also surtvived a 4.6 EQ from Northern California (and 2 of its similar aftershocks),.

LOG:

None

TITLE: 06/28 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY: Two locklosses, mostly automated relock on the first one. We are relocking at DRMI currently.
LOG: No log.

• 13:25 UTC lockloss
  • 15:53 UTC Observing
  • 18:23 UTC Superevent S250628am
  • 19:00 - 19:31 UTC dropped observing to run a calibration measurement
• 20:43 UTC lockloss
  • 22:05 UTC observing
• 23:18 UTC lockloss

23:18 UTC lockloss

TITLE: 06/28 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 20mph Gusts, 8mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

IFO is in NLN and OBSERVING as of 22:05 UTC

IFO recovered from an ETM glitch lockloss an hour ago.

20:43 UTC lockloss

There was a small ETMX glitch 1/4 of a second before the lockloss

We had been locked for just over 3 hours with a circulating power of ~381 kWs.

BroadBand

Start: 2025-06-28 19:01:05 UTC

Stop: 2025-06-28 19:06:16 UTC

Data: /ligo/groups/cal/H1/measurements/PCALY2DARM_BB/PCALY2DARM_BB_20250628T190105Z.xml

Simulines

Start: UTC: 2025-06-28 19:06:42.332738 UTC  // GPStime: 1435172820.332738

Stop: UTC: 2025-06-28 19:30:00.055193 UTC // GPStime: 1435174218.055193

Data:

2025-06-28 19:29:59,859 | INFO | File written out to: /ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20250628T190643Z.hdf5
2025-06-28 19:29:59,882 | INFO | File written out to: /ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20250628T190643Z.hdf5
2025-06-28 19:29:59,889 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20250628T190643Z.hdf5
2025-06-28 19:29:59,897 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20250628T190643Z.hdf5
2025-06-28 19:29:59,904 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20250628T190643Z.hdf5

Sat Jun 28 10:12:51 2025 INFO: Fill completed in 12min 47secs

TITLE: 06/28 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Aligning
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 5mph Gusts, 3mph 3min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

• We're in the middle of an alignment
• There's been several medium/large earthquakes overnight
• Low wind, and secondary microseism

TITLE: 06/28 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

IFO is in ACQUIRE_DRMI_1F and LOCKING

Overall a very calm shift in which we were locked for the majority of it until the ETM glitch (lockloss alog 85402) killed the 8 hour lock.

Relocking was time consuming since the alignment was terrible and we have the 30 min wait before we can do an initial alignment. After I ran a fully auto inital alignment, locking went quickly until we lost lock at LOWNOISE_ASC (522). This also happened yesterday. Just like yesterday, the wind was hovering around 25mph with the primary microseism on the rise. Just like yesterday, there was an earthquake coming through. While I think we could have rode the EQ out and that the wind conditions weren't too bad, I believe that either this state might be a tad more susceptible to such noise or there's a controls issue. (or the same thing happened twice in the same way and will only happen twice). I will investigate tomorrow during shift.

Either way, we lost lock from DRMI but flashes looked good and I think (knock on SSTL) guardian will be able to get into OBSERVING on its own.

On the bright side, we rode through a 6.1 EQ from the phillippines though I did intervene to turn EQ mode on manually since the bulk of the ground motion was starting but the automation hadn't turned it on yet (judging from how much the ISC had to move to keep IFO still).

LOG:

None

Lockloss due to ETM Glitch. H1 Lockloss Tool.

As I was writing this, we lost lock at LOWNOISE_ASC, same as yesterday. There also happened to be a 5.5 EQ passing through (same as yesterday with a more local 3.0 one)