Reports of 43241
Virgo Runs (O3)
berni - 14:58 Sunday 08 December 2019 (47881) Print this report
Operator Report - Morning shift

ITF found in Science mode.
Form 7:08 UTC to 7:10 UTC it went out of Science mode because of Squeezer pump phase reset.
The ITF unlocked at 10:51 UTC and the unlock seems due to the saturation of SSFS correction, see plot 1.
After the unlock the nodes ITF_LOCK and SUS_NE went in error; looking at their log files I found the following error:
ParsingError: File contains parsing errors: /virgoDev/Automation/userapps/SUS_NE.ini
    [line 11]: '37\n'

I removed that line, then I restarted the nodes that were "STALLED" and I could start the lock acquisition; the ITF was locked at the first attempt and Science mode was set at 11:45 UTC.

ITF left in Science mode.

Guard tours (times in UTC)

  • from 6:00 to 6:30;
  • from 8:10 to 8:50;
  • from 10:00 to 10:30;
  • from 12:20 to 12:50;

DAQ
port 11 of optical transceiver of the MxDx_SN12 unplugged and plugged at 11:20 UTC; this operation did not solve the problem. I contacted Alain and we decide to postpone any further investigation to tomorrow morning during the planned DAQ shift.

EnvMoni
Red flag for CB_Hall - ENV..CEB_N_TE showing a flat temperature of 47.011; this is an unrealistic. Experts have been informed.

SBE
Taking advantage of the unlock I readjusted a bit the vertical position of SDB2, see attached plot 2.

Air Conditioning
(07-12-2019 19:00 - ) check the behavior of INF..TB_UPS_TE,

SBE
(07-12-2019 19:00 - ) check the behavior of SBE_SDB2_ACT_F0V.

Images attached to this report
Virgo Runs (O3)
bertolini - 10:38 Sunday 08 December 2019 (47880) Print this report
Comment to Operator Report - Night shift (47878)

The drift of the vertical degrees of freedom of the SDB2 suspension follows the drift of the bench temperature (see plot) that keeps rising due to the malfunctioning of the DET ACS; further re-adjustment with the step motors will be needed till the problem is solved.

Images attached to this comment
Virgo Runs (O3)
masserot - 9:03 Sunday 08 December 2019 (47879) Print this report
Comment to Operator Report - Afternoon shift (47877)

DAQ

At the next unlock unplug anf replug the port 11 optical transceiver of the MxDx_SN12  located in the DAQ room in order to restore the data reception of the ERR_ADC_Moni1 ADC (ADC7674_SN21) located in the EERoom.

Virgo Runs (O3)
amagazzu - 6:57 Sunday 08 December 2019 (47878) Print this report
Operator Report - Night shift

ITF found in Science Mode, it kept the lock for the whole shift.
ITF in Adjusting mode from 3:41 UTC to 4:11 UTC in order to recovery the vertical correction of SDB2 SBE.

Guard Tour
23:30 UTC - 0:03 UTC;
1:31 UTC - 2:00 UTC;
3:34 UTC - 4:05 UTC;
5:00 UTC - 5:33 UTC.

Air Conditioning
The temperature of the UPS room in the Technical building stabilized after the intervention ( see attached plot #1 ).

SBE
During the shift the vertical correction of SBD2 SBE steadily increased ( see attached plot #2 ). From 3:41 UTC to 4:11 UTC I used the related motor to decrease the correction. After the intervention the value started increasing again.

Air Conditioning
(07-12-2019 19:00 - ) check the behavior of INF..TB_UPS_TE,

DAQ
(07-12-2019 16:00 - ) At next unlock unplug and replug MuxDemux 11in DAQ Room in order to restore environmental channels (grey flags on DMS) - contact DAQ OnCall.

SBE
(07-12-2019 19:00 - ) check the behavior of SBE_SDB2_ACT_F0V.

Images attached to this report
Comments to this report:
bertolini - 10:38 Sunday 08 December 2019 (47880) Print this report

The drift of the vertical degrees of freedom of the SDB2 suspension follows the drift of the bench temperature (see plot) that keeps rising due to the malfunctioning of the DET ACS; further re-adjustment with the step motors will be needed till the problem is solved.

Images attached to this comment
Virgo Runs (O3)
menzione - 23:02 Saturday 07 December 2019 (47877) Print this report
Operator Report - Afternoon shift

Upon arrival, ITF was Locked in LN3 and BNS Range ~44 Mpc. The issue was to check the SQZ subsystem, Zendri asked us to wait to engaging it.
Meanwhile, the FoV of SDB2 was increasing since this morning, so, with Bertolini, we decided to restore the standard position acting on Motors. The operation has been concluded at 14:22 UTC.
Science Mode set.
15:31 UTC SQZ Injected successfully. BNS Range increased up to ~48 Mpc.

GRB
21:49 UTC - [gracedb] Fermi event created: E356793. Alert reset at 21:51 UTC.

Guard Tour (UTC)
14:00  - 14:30;
16:16 - 16:43;
18:00 - 18:21;
20:03 - 20:28;

Air Conditioning
ACS fan in UPS TB got stuck. The environmental temperature of the room increased in the last 2 days reaching over 29C (DMS threshold) I contacted ACS and Electricity experts and I reactivated it at 18:50 UTC (plot2). The problem is that the machine is very noisy and not efficient. An intervention of an external company is foreseen for Monday afternoon.

DMS
14:00 UTC - Subflags Shelved under request of Pasqualetti:
- VAC_TUBE1800W..P22ST
- VAC_TUBE1800W..PR1
- VAC_TUBE1800W..V21ST
- VAC_TUBE1800W..V22ST

SBE
14:00 UTC - SBE_SDB2_ACT_F0V out of range. With SBE expert we restored the correct position but it is increasing again. To be monitor in the next hours. (plot1)

Air Conditioning
(07-12-2019 19:00 - ) check the behavior of INF..TB_UPS_TE,

DAQ
(07-12-2019 16:00 - ) At next unlock unplug and replug MuxDemux 11in DAQ Room in order to restore environmental channels (grey flags on DMS) - contact DAQ OnCall.

SBE
(07-12-2019 19:00 - ) check the behavior of SBE_SDB2_ACT_F0V.

Air Conditioning
(07-12-2019 18:45 - 07-12-2019 19:00) Operator on site with expert from remote
Status: Ended
Description: Failure of TB AC fan in UPS TB.

Electricity
(07-12-2019 18:45 - 07-12-2019 19:00) Operator on site with expert from remote
Status: Ended
Description: Failure of TB AC fan in UPS TB.

SBE
(07-12-2019 16:00 - 07-12-2019 16:30) From remote
Status: Ended
Description: SBE_SDB2_ACT_F0V out of range.

SQZ
(07-12-2019 16:00 - 07-12-2019 16:30) Operator on site with expert from remote
Status: Ended
Description: SQZ Injected successfully.

Vacuum
(07-12-2019 16:30 - 07-12-2019 17:00) From remote
Status: Ended
Description: Subflags Shelved under request of Pasqualetti

Images attached to this report
Comments to this report:
masserot - 9:03 Sunday 08 December 2019 (47879) Print this report

DAQ

At the next unlock unplug anf replug the port 11 optical transceiver of the MxDx_SN12  located in the DAQ room in order to restore the data reception of the ERR_ADC_Moni1 ADC (ADC7674_SN21) located in the EERoom.

Virgo Runs (O3)
Nenci - 15:02 Saturday 07 December 2019 (47876) Print this report
Operator Report - Morning shift

ITF unlocked at 06:42 UTC due to a saturation of SSFS corrections. Humidity system of the DET Lab restarted with the expert on site (pending action). ITF relocked at the first attempt, Science Mode at 7:19 UTC. 

SQZ - at 14:30 UTC following the instructions of the expert we started to restore the SQZ. ADJUSTING MODE from 13:40 UTC to the end of the shift and still in progress.

Vacuum - DMS showed red flag for "VAC TUBE 1800W..P22ST", the expert is monitoring the situation.

 

Virgo Runs (O3)
ruggi - 11:17 Saturday 07 December 2019 (47875) Print this report
lockloss

The lockloss at 6:42:20 UTC was due to the saturation of SSFS correction, subsequent to a jump of PSL_PMC_TRA DC.

Images attached to this report
Virgo Runs (O3)
magazzu - 7:07 Saturday 07 December 2019 (47874) Print this report
Operator Report - Night shift

ITF found in Science Mode and LOW_NOISE_3, it kept the lock for the whole shift.

Guard Tour
23:42 UTC - 0:13 UTC;
1:34 UTC - 2:06 UTC;
3:32 UTC - 4:02 UTC;
4:55 UTC - 5:27 UTC;

Air Conditioning
- Since around 12:00 UTC the Temperature inside the DET Lab changed behavior ( see attached plot #1 ). Expert informed of this event.
- At 23:10 UTC I was contacted by the ACS Oncall ( D. Soldani ) that reported that the humidity system of the DET Lab has stopped. Under his instructions, I went outside of the Central Building and restarted the machine. ITF in Adjusting Mode from 23:14 UTC to 23:22 UTC in order to perform this action. The system stopped working again soon after ( see attached plot #2 ), in agreement with Soldani we will try to restart it again at the next unlock.

DAQ
At around 22:10 UTC the process MdVimSpectro_set2 was reported not working from the DMS and VPM. Investigating on the related machine ( olserver148 ) I found multiple instances of the process. After stopping them by hand I was able to restart the process at 23:53 UTC.

Images attached to this report
Virgo Runs (O3)
menzione - 23:01 Friday 06 December 2019 (47872) Print this report
Operator Report - Afternoon shift

14:00 UTC ITF in Science Mode (without SQZ) with BNS Range 48 Mpc.
1 minute of Adjusting Mode at 14:09 UTC under request of Masserot for reconfiguring SSFS_ADC in SSFS_dbox.

ITF unlocked due to the Earthquakes occurred in Tonga Islands.
Back in Science Mode at first attempt at 17:30 UTC.

After the unlock of 19:30 UTC, under request of Masserot, I reload ITF_LOCK.Main, it crashed. properly restarted.
Back in Science Mode at first attempt at 19:53 UTC.

Air Conditioning
14:00 / 14:45 UTC - External company intervention on UTA DET.

DAQ
14:08 UTC - I disabled DetServo during the restoring of UTA DET and reEnabled it at 17:28 UTC.
MdVimSpectro crashed / restarted at:
14:26, 16:00, 16:45, 17:35, 18:23, 19:10 UTC.
MdVimSpectro_set2 crashed / restarted at:
15:59, 16:00, 16:44, 16:45, 17:21, 17:55, 18:31, 19:10, 19:47, 20:24, 20:59, 22:34 UTC.

AdV-COM (AdV commissioning (1st part) )
casanueva, brooks - 16:32 Friday 06 December 2019 (47873) Print this report
New DARM offset

During yesterday morning shift we changed the offset of DARM until reaching 1mW on the B1 photodiodes. We also adjusted the gain of DARM to keep the UGF around 96 Hz. The alignment didn't seem to have changed a lot, but we run three iterations of the AAtuning script (see Figure 1).

As it was not possible to engage the squeezing at that moment, we took as a reference some data with the old DARM offset (2mW, in purple), and we compare them with the new offset before (in beige) and after the alignment tuning (blue), as shown in FIgure 2. We lost 2 Mpcs, since there was a noise inceasing from 30 to 90 Hz.

Otherwise the configuration was stable so we let the ITF in this new DARM offset and I modified the gain and the darm offset values in LN3, so the lock acquisition is the same but when reaching LN3, the ITF goes to this new point.

Images attached to this report
AdV-DAQ (Data Acquisition and Global Control)
masserot - 15:14 Friday 06 December 2019 (47871) Print this report
Mezzanine "SSFS ADC" readout disabled

At 14h09UTC the mezzanine ADC2378 "SSFS_ADC" was reconfigured to disable its data transmission to the SSFS rtpc (rtpc2)

The following lines were commented

#DBOX_ADC2378_OUTPUT_PACKET_FULL    0    "" SSFS_RTPC_FREQUENCY    "" SSFS_DAC_SE_NS
#DBOX_ADC2378_OUTPUT_PACKET_FULL    1    "" 10000                "" ENV_RAM_8MHz_moni    ENV_RAM_56MHz_moni

 

Virgo Runs (O3)
Nenci - 15:02 Friday 06 December 2019 (47868) Print this report
Operator Report - Morning shift

ITF locked in Science Mode for all the shift with the squeezer in rest position (BNS Range ~49 Mpc). The humidity in the DET area is not still stabilized (picture n1 attached) therefore we are waiting for engage again the squeezer.

SPBR_SBE - the position of SBE_SPRB_ACT_F0V drifted untill 4,5V, but the trend has been inverted since this morning avoid the using of the motors (picture n2 attached).

Images attached to this report
Virgo Runs (O3)
tacca, vardaro - 15:00 Friday 06 December 2019 (47869) Print this report
Comment to Operator Report - Night shift (47866)

Exploiting the periods with shutter closed and open acquired during the night I tried to understand if backreflected light from ESQB decreases the ITF sensitivity.

Figure 1: Normalized DARM spectrogram between 0 and 30 Hz. If we observe the frequency band between 10 and 15 Hz we observe the following effects:

  • between 18 and 23 the slow shutter was closed. From 23 Fabio started to open and close it every hour. 
  • We can see that between 23:00 of the 5 Dec and 6:00 of 6 Dec the noise between 10 and 15 Hz increased when the shutter was open and decreased when the shutter was closed

Figure 2: FFT of hrec between 10 and 100 Hz. Blue lines are Data stream with shutter closed and red lines are Data streams with Shutter Open. (Used FFT parameters: FFT length 10s, overlap 50%, number of averages 200, i.e. 1000s of data for each spectrum). We can see the increase of noise between 10 and 15 Hz.

Figure 3: The average of spectra of Figure 2. Blue shutter closed, red Shuttter Open. In black the target sensitivity of O3 taken from VIM. From the plot we can see:

  • between 10 and 15 Hz the sensitivity was spoiled when the SQZ slow shutter was open
  • between 25 and 40 Hz is visible a quite negligible increase in noise with the SQZ shutter open.

Summary: the back reflected light from the squeezer spoils the sensitivity between 10 and 15 Hz and between 25 and 40 Hz. Now this effect is not worrying, but this night the weather conditons were good (we are below the target sensitivity thank to the weather) . Maybe, it is better to check the centering of the mirrors in order to avoid problems in the future.

Images attached to this comment
Environmental Monitoring (Environmental Monitoring)
pascucci, tacca - 14:51 Friday 06 December 2019 (47870) Print this report
Accelerometer on EPRB
Under request of ALS people, in order to estimate the motion of small benches attached to MiniTowers, on Tuesday Dec 3rd, during the maintenance, we moved the accelerometer installed on the PR-BS pipe on EPRB.
Images attached to this report
AdV-ISC (Automatic Alignment)
mantovani - 10:47 Friday 06 December 2019 (47867) Print this report
ITF aligned due to SDB1 scattering light peaks visible in the sensitivity

This morning, I've run the AA script since the scattering light peaks of SDB1 were visible in the sensitivity.

The trend of the alignment is visible in Figure 1 and the effect on the sensitivity of the alignment is visible in Figure 2 (purple before blue after).

I' ve updated the DiffP ty set value in the Metatron ini file.

 

Images attached to this report
Virgo Runs (O3)
Gherardini - 6:58 Friday 06 December 2019 (47866) Print this report
Operator Report - Night shift

The ITF kept the science mode all the shift.

-guard tours(UTC):
23:30 --> 0:05
1:35 --> 2:05
3:35 --> 4:05
5:00 --> 5:35

SQZ
ESQB slow shutter(UTC), under request of M.Vardaro to check the squeezer system about stray light problem:
23:01 --> open
0:02 --> close
1:02 --> open
2:00 --> close
3:01 --> open
4:03 --> close
5:00 --> open
4:03 --> close
5:00 --> open
5:54 --> close

Comments to this report:
tacca, vardaro - 15:00 Friday 06 December 2019 (47869) Print this report

Exploiting the periods with shutter closed and open acquired during the night I tried to understand if backreflected light from ESQB decreases the ITF sensitivity.

Figure 1: Normalized DARM spectrogram between 0 and 30 Hz. If we observe the frequency band between 10 and 15 Hz we observe the following effects:

  • between 18 and 23 the slow shutter was closed. From 23 Fabio started to open and close it every hour. 
  • We can see that between 23:00 of the 5 Dec and 6:00 of 6 Dec the noise between 10 and 15 Hz increased when the shutter was open and decreased when the shutter was closed

Figure 2: FFT of hrec between 10 and 100 Hz. Blue lines are Data stream with shutter closed and red lines are Data streams with Shutter Open. (Used FFT parameters: FFT length 10s, overlap 50%, number of averages 200, i.e. 1000s of data for each spectrum). We can see the increase of noise between 10 and 15 Hz.

Figure 3: The average of spectra of Figure 2. Blue shutter closed, red Shuttter Open. In black the target sensitivity of O3 taken from VIM. From the plot we can see:

  • between 10 and 15 Hz the sensitivity was spoiled when the SQZ slow shutter was open
  • between 25 and 40 Hz is visible a quite negligible increase in noise with the SQZ shutter open.

Summary: the back reflected light from the squeezer spoils the sensitivity between 10 and 15 Hz and between 25 and 40 Hz. Now this effect is not worrying, but this night the weather conditons were good (we are below the target sensitivity thank to the weather) . Maybe, it is better to check the centering of the mirrors in order to avoid problems in the future.

Images attached to this comment
Virgo Runs (O3)
magazzu - 23:02 Thursday 05 December 2019 (47865) Print this report
Operator Report - Afternoon shift

ITF found in Science Mode at LOW_NOISE_3. It kept the lock for the whole shift.
The Humidity on the DET Lab started decreasing again from around 14:25 UTC ( see attached plot #1 ).  From 15:25 UTC to 15:37 UTC in agreement with the Weekly Coordinator, the ITF was set in Adjusting Mode to allow D. Soldani to restart the humidification system of the DET Lab. Unfortunately the humidity started decreasing again soon after, a dedicated technician should be on site tomorrow morning to investigate the issue.
Another brief interruption from Science was done from 16:45 UTC to 16:46 UTC to allow M. Vardaro to switch the Squeezer in "Rest Position" in order to not compromise the Squeezing alignment ( see report # ).
ITF left locked.

VPM
EnvMoni Restarted at 17:21 to add a new flag ( mean(ENV..SQZ_HU,60)>35 ) in order to monitor the Squeezer Humidity value.

Guard Tour
18:32 UTC - 19:09 UTC
20:32 UTC - 20:59 UTC

Images attached to this report
AdV-DET (Photodiodes + demodulation boards (longitudinal control))
masserot, casanueva - 22:31 Thursday 05 December 2019 (47864) Print this report
B4_PD1_56MHHz and B4_PD2_56MHz dephasing measurements and adjustments

We setup

  • the B4_{PD1,PD2}_56MHz dephasing measurements using the SSFS line at 3354Hz on the SPRB_Photodiodes .
  • and the automatic adjusment by Metatron when the ITF is at LOW_NOISE_2

The attached plots show

  • the FFT of the SPRB_B4_PD2_56MHz_{I,Q}, SSFS_Err_{I,Q}_unnorm_10KHz and theirs correlations
  • the SPRB_B4_DC and the SSFS_B4_norm_10kHz .

It is strange to see the lack of coherence between the SPRB_B4_PD2_56MHz_Q and the SSFS_Err_Q_unmorn_10kHz signals in the [2Hz-6Hz] frequency band region.

Images attached to this report
AdV-AEI Squeezer Integration (General)
vardaro, magazzu - 18:42 Thursday 05 December 2019 (47863) Print this report
SQZ Slow shutter closed and Rest position

Because of the humidity problem at 16:46 UTC we set the squeezer in rest position in order to avoid the AEI sqz controllers to engage the lock in a misaligned state.

At 17:41 we closed the slow shutter in order to see possible effects of stray light.

AdV-COM (AdV commissioning (1st part) )
Allocca, Ruggi - 16:37 Thursday 05 December 2019 (47862) Print this report
Variation of B1p power and position on the camera

Since this morning a couple of "jumps" of the B1p power (not related to the DARM offset reduction) have been noticed. They seem to be related to a slight change of position of the beam on the B1p camera. (figure 1)

We checked the signals for the vertical position of SR, and it seems that the 15 um of drift of F7 are compensated by the upper part of the suspension. At a first glance, it is not clear if anything is changing in the SDB2 alignment. To be better investigated by the experts.

This drift is also visible on the SDB2_B1p_QD2_GALVO_V correction.

We also checked in the same DARM offset conditions (1mW on B1) if there was any variation in the higher order modes content on B1, but there is no evident difference, besides a very small astigmatism of the beam (figures 2 and 3).

Images attached to this report
AdV-DAQ (Data Acquisition and Global Control)
masserot, letendre - 16:05 Thursday 05 December 2019 (47860) Print this report
SSFS and SQZ_CC: RTPC - DSP flags

The plots show the monitoring channels related to the data exchanges(rtpc<->DSP, demodulation->DSP) for the SSFS and the SQZ_CC fast loops over last week (20191125 to 20191206)

Images attached to this report
AdV-AEI Squeezer Integration (automation)
sorrentino, vardaro, bersanetti - 16:03 Thursday 05 December 2019 (47859) Print this report
SQZ AA issue due to ITF alignment changes between LN1 and LN3

Recently the ITF relocks sometimes with a wrong setting of the SQZ alignment. One event of this kind is shown in the first 3 attachments where the AA actuators, error signals, and SQZ level are displayed.

The automation so far was engaging the SQZ lock and AA since the ITF is in LN1. The problem arises because now the ITF alignment settings in LN1 and LN3 are substantially different from each other; thus the SQZ slow AA must suddenly change between the two configurations, see fourth attachment. In particular the last large displacement of SQZ AA actuators occurs when META_IFT_LOCK_index moves to 126 (see fifth attachment). This may occasionally leave one of the actuators stuck close to saturation (see sisxt attachment). With large misalignment the error signal for dither lines AA becomes very small, and when squeezing in injected the AA loop may take hours to achieve a good alignment. In the meantime the squeezing level is reduced.

To work it out this morning Diego changed the automation logic in ITFLOCK; now the SQZ lock occurs under ACQUIRE_LOW_NOISE_3.

Images attached to this report
Virgo Runs (O3)
menzione - 15:04 Thursday 05 December 2019 (47857) Print this report
Operator Report - Morning shift

Upon arrival, I found ITF in Science Mode with BNS Range ~48 Mpc.
Planned Commissioning activities started at 07:30 UTC, with the measurement of the phase of B4, carried out, from remote, by A. Masserot. At 08:30 UTC J. At 08:00 UTC Casanueva started with "DF Offset reduction".
All Commissioning and parallel activities have been concluded at 14:00 UTC.
ITF back in Science Mode at 14:00 UTC (without SQZ). BNS Range 43 Mpc with ITF in this new configuration.

Parallel activities, during the Commissioning break, communicated and approved by the Control Room:

  • Infrastructures intervention on UTA DET in CB for the humidity control of Det Lab (Soldani). It was not working properly since 3/12 (plot1). The humidity was ~24% but the SQZ good working point should be ~35%.
    The system has been restored at 08:10 UTC and the humidity is now slowly increasing again. Checking at the trend, a good humidity working point will be obtained in the next 24 hours but, SQZ can be however injected in safety way. In addition, in order to keep faster the humidification of the Det Lab, the Infrastructures crew installed an additional water bucket.
  • Infrastructures measurements around BS, SR, Cryo trap N, Det Lab, N Gallery at the level of the concrete floor. Activity performed by Paoli and Fabozzi from 08:00 to 14:00 UTC.
  • Checks on IER racks carried out by the electronic crew from 08:30 to 09:30 UTC.
  • Devices movimentation in Cleaning Lab (CB) by VAC crew from 09:39 to 09:47 UTC.

DAQ
07:44 UTC - WARM_LOCK crashed / restarted
13:30 UTC - MdVimSpectro crashed / restarted via shell.

DMS
08:30 UTC - INF..NEB_TE_OUT threshold changed under request of Soldani.
10:24 UTC - ENV..EDB_HU_IN (DET_Area), HVAC..DET_HU_IN (ACS_DET), subflags added. (now reds due to the UTA failure)

Images attached to this report
Virgo Runs (O3)
estevez, rolland - 10:13 Thursday 05 December 2019 (47858) Print this report
Comment to Operator Report - Afternoon shift (47855)

The GW alert received during the Calibration happened when injections on NE and WE mirror actuators were performed at the following frequencies:

NE 98.20 Hz, 908.20 Hz

WE 98.70 Hz, 908.70 Hz

Figure 1 shows at the top the injections with the CAL_*_MIR_Z_NOISE channels (the usual permanent calibration lines + the lines mentioned above), in the middle the coherence between these channels and Hrec_hoft_raw, at the bottom the coherence between these channels and Hrec_hoft. Note that there is coherence with Hrec_hoft at the injected calibration lines since the signal is very strong for calibration purpose.

Figure 2 shows the CAL_*_MIR_Z_NOISE in time from ~7 seconds before the event (GPS 1259514937) to ~3s after the event (GPS 1259514947). Note that the event happened at the end of this set of calibration injections which means that depending on the time window used the ~98 Hz and ~908 Hz lines can be constant in amplitude for one part of the window and then decrease in amplitude for the last part.

 

Images attached to this comment
Virgo Runs (O3)
Gherardini - 6:57 Thursday 05 December 2019 (47856) Print this report
Operator Report - Night shift

The ITF kept the science mode all the shift.


-guard tour(UTC):
23:00 --> 23:35
1:00 --> 1:35
3:10 --> 3:45
5:00 --> 5: 35

ISC
Here the result of the AATuning Servo, the new values have been saved in the .ini file.

diffp_tx_set_ln3: -0.0062 --> 0.0005
diffp_ty_set_ln3: -0.028 --> -0.0266
pr_tx_set_ln3: -0.003 --> -0.0097
pr_ty_set_ln3: 0.0076 --> 0.0038
bs_tx_set_ln3: -0.006 --> -0.0057
bs_ty_set_ln3: 0.003 --> 0.0019

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