ryan.crouch@LIGO.ORG - posted 16:52, Sunday 21 September 2025 - last comment - 20:59, Sunday 21 September 2025(87048)
21:51 UTC lockloss
21:51 UTC lockloss
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:
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
04:15 UTC Observing
TITLE: 09/20 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: Currently Observing at 150 Mpc and have been Locked for 13.5 hours now. We dropped Observing for the calibration measurements earlier today, but besides that, nothing has happened.
LOG:
14:30 Observing and have been Locked for 4.5 hours
15:26:03 GRB-Short E601013
15:26:14 GRB-Short E601014
15:26:25 GRB-Short E601013 (again?)
18:31 Dropped out of Observing to run calibration measurements
18:31 Went to NLN_CAL_MEAS, took calibration measurements
19:02 Back to NOMINAL_LOW_NOISE
19:02 Observing
19:41 Big plane flying overhead Tagging detchar
TITLE: 09/20 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 147Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 21mph Gusts, 16mph 3min avg
Primary useism: 0.03 μm/s
Secondary useism: 0.21 μm/s
QUICK SUMMARY:
At the time of starting the calibration suite, we had been locked for 8.5 hours and so were fully thermalized.
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
Adding a comment here to note two things:
The thermalization adjustment of the SRCL offset appears to still be performing well according to the grafana page.
There is a 2% difference in TST actuation strength between the model that was pushed on 8/23 to the model created from this measurement. This is also reflected in kappa TST being about 1.02 after thermalization. This is likely due to charging. Tagging CAL and SUS.
Sat Sep 20 10:44:23 2025 INFO: Fill completed in 9min 20secs
Note this fill ran at the later time of 10:35:00 this morning.
Haven't seen this for a while, but CP1 code must have skipped the 10:00:00 start time. I've manually loaded an temporary config to run at 10:35:00, it is running now.
TITLE: 09/20 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: 0.24 μm/s
QUICK SUMMARY:
Observing at 150 Mpc and ave been Locked for 4.5 hours. Secondary useism is on its way back down
TITLE: 09/20 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Observing at 155Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY: We lost lock once, relocking was smooth. we've been locked for a little over an hour.
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 23:08 | PCAL | Dripta, Rick, Tony | PCAL Lab | y(local) | Fixing up the lab con't | 23:41 |
02:32 UTC lockloss
03:47 UTC Observing
Closes FAMIS#26662, last checked 86750 Laser Status: NPRO output power is 1.873W AMP1 output power is 69.91W AMP2 output power is 138.9W NPRO watchdog is GREEN AMP1 watchdog is GREEN AMP2 watchdog is GREEN PDWD watchdog is GREEN PMC: It has been locked 3 days, 3 hr 49 minutes Reflected power = 24.56W Transmitted power = 104.1W PowerSum = 128.7W FSS: It has been locked for 0 days 3 hr and 22 min TPD[V] = 0.5336V ISS: The diffracted power is around 4.5% Last saturation event was 0 days 5 hours and 44 minutes ago Possible Issues: PMC reflected power is high FSS TPD is low
In regards to the "FSS TPD is low" warning, this is simply because we've recalibrated that PD as of Tuesday (alog86972), so the nominal "good" value has changed and I forgot to update this status script accordingly. Since we just realigned the FSS path and are happy with the results, this TPD reading of about 0.54 V is acceptable.
PMC REFL being high is not a new issue, but it doesn't hurt to be reminded about it.
Winds are gusting over 30mph with a 3 min avg of 20mph. Relocking might take a little while. From windy.com (which uses ECMWF, European Centre for Medium-Range Weather Forecasts ) the winds are predicted to get a little worse in the next 2 or 3 hours then calm down around 4/5 UTC.
03:57 UTC Observing