Meetings

• Meeting time: 14:00-15:00 JST/KST on every Thursday
• Meeting room: Zoom

Agenda & Minutes

20211122 (Mon.)

• Agenda
  • Investigation about 120Hz glitches
  • Segments for Open data
  • Progress of DQR
  • Site commissioning
  • Report from LVK DAC telecon

20211115 (Mon.)

• Agenda
  • O3GK Glitch investigation
  • Segment information for open data
  • Progress of DQR
  • Site commissioning
• Minutes

  • O3GK Glitch investigation => Skipped.

  • Segment information for open data
    • Data reproduction with correct segments were finished.

    • We need to check about error estimation of 4kHz downsampled data. => TY

    • Data will be release at the same time with O3GK paper.
  • Progress of DQR
    • LValert was update as python3 in LIGO.
    • We also need to move new version for O4.

    • Software test will be conducted on k1det0,1 => HY

  • Site commissioning
    • PSL room is now in working mode for future works.
      • PMC, PLL, IMC signals are affected by sound noise.

    • Glitches on MC OpLevs were decreased by wind shields.

      • before -> after

      • Noise floor level was also improved. (klog#18756)

      • Alignment jump by seismic disturbance in high frequency (1Hz~) still remains.
        • We need to take care about K1:VIS-MC{I,E,O}_TM_WIT_{P,Y} and K1:IMC-IMMT1_TARNS_QPDA1_DC_{PIT,YAW}_OUT

      • Plot range should be changed on SummaryPages. => SO

20211108 (Mon.)

• Agenda
  • O3GK Glitch investigation
  • Segment information for open data
  • Progress of DQR
• Minutes (Yuzurihara)
  • O3GK Glitch investigation (Kihyun)

    • Kihyun checked the omega-scan at the time of glitch. slide (see the last three slides)

    • There is no glitches in these channels at the same time of the glitch.
  • Segment information for open data (Uchikata)
    • They checked which data segments were used for GRB analysis. The correct DQ segment was used for GRB analysis.
    • For some reason, the wrong segment information was used for open data.
    • The reproduction of open data is on-going. The data set needs the review again.
  • Progress of DQR (Yuzurihara)

    • Recently the new feature to archive the parallel process was added in TaskManager.

    • Yuzurihara is testing this feature to apply KAGRA data.

20211101 (Mon.)

• Agenda

  • O3GK noise budget paper JGW-P2113405-v1

  • hveto, O3GK glitches
  • Info. for open data
  • Progress of DQR
• Minutes
  • Info. for open data

    • We should refer segments on DQSEGDB

    • For GW searches: K1-SCIENCE_MODE, DET_FOR_GRB200415A
    • We need to check [1270965983, 1270976372) and [1270976435, 1270976783).

20211025 (Mon.)

• Agenda
  • Omicron glitches (40?, 120Hz)

  • DQR slide

• Minutes
  • Omicron glitches
    • ALS channels has some coincidence.
      • Cavity and suspensions are shared GR and IR lasers.
      • It's not identified the cause (GR laser or suspensions) yet from current results.
    • Chamber ACC at EXC has also same glitches.
      • hveto cannot detect coincidence on EYC and other ACC channels.

      • These channels also checked by Omega-scan once => Kihyun.

20211011 (Mon.)

• Agenda
  • site commissioning
  • omicron/hveto analysis
  • DQR
• Minutes
  • site commissioning

    • MC OpLev glitches (klog#18518)

    • PLL resonance (klog#18466)

    • IX MN glitches vanished(?) (klog#17876)

20210927 (Mon.)

• Agenda
  • hveto analysis
  • O4 commissioning

  • progress of DQR slide

• Minutes
  • hveto

    • glitch rate was computed for O3GK paper JGW-D2113311

    • Clustering (with 0.1s window) was performed on gwpy function
  • O4 commissioning
    • Commissioning is now pending and suspension health check is ongoing.

20210906 (Mon.)

• Agenda
  • hveto analysis
  • O4 commissioning
  • JPS meeting
• Minutes
  • O4 commissioning

    • Turn on the clustering option of Omicron (k-log#18070)

    • periodic glitches are happening in ITMX (klog#17876)

      • These glitches seems to be correlated to IXV temperature (#17912)

      • To find the source of ITMX glitches, there is a investigation (#17980)

      • Update of summary page : Added ITMX signals for glitch pipeline (k-log#18112)

    • Implementation of GAS DC control for ITMX (k-log#18153)

20210830 (Mon.)

• Agenda
  • hveto analysis
  • O4 commissioning
  • O4 readiness
• Minutes
  • hveto analysis

    • veto segment list will be shared. => Kihyun

  • O4 commissioning

    • PLL noise (klog#18014)

    • periodic glitches are happening in ITMX (klog#17876)

      • These glitches seems to be correlated to IXV temperature (#17912)

      • To find the source of ITMX glitches, there is a investigation (#17980)

    • MCi and MCo pitch strange behavior (k-log#18027)

    • Glitch investigation by Omicron
      • If there are many sources of glitches, information about small change in glitch rate is helpful to noise hunting.

      • ITMX PS should be added on SummaryPages => Oshino

      • And also we should set 0.1s clustering option as the first test for Omicron process.
      • In pyomicron, 0.1s clustering is default settings and pyomicron is available in igwn.
  • O4 readiness
    • #15 [Cont'd] State Vector Definition

      • Responsible: T. Yamamoto -> T. Yamamoto

    • #16 + #20 Segment production with short latency

      • Responsible: K. Kokeyama -> S. Oshino, T. Yamamoto

    • #17 [Cont'd ] Status web pages (summary pages, gw status, gw istat)

      • Responsible: S. Oshino -> S. Oshino

    • #18 [Cont'd] DQ event validation

      • Responsible: C. Kozakai -> K. Ueno, T. Yamamoto

    • #19 [Cont'd] GraceDB

      • Responsible: H. Tagoshi -> H. Tegoshi(?)

    • #21 [New] Data Category (at least CAT1) production

      • Responsible: N. Uchikata(?)

    • #22 [New] RRT contribution

      • Responsible: H. Yuzurihara

  • Taks list of DetChar

    • We need to set concrete task list for authorship issue. (within 1 month?) => Yamamoto

    • Time line of each tasks also should be decided => Yamamoto & each responsible person

    • After creating the draft version of task list and time line, they will be shared on DET telecon.

20210823 (Mon.)

• Agenda
  • hveto analysis

  • O4 commissioning & preparation

  • f2f meeting
• Minutes
  • hveto analysis
    • O3GK 2 weeks data was analyzed with new configuration.
    • Blip, LF burst were found in many times.
    • All vetoed segments will be shared soon.
  • O4 commissioning
    • IMC commissioning is on-going
      • beam shape of transmitted beam at MCE is not clear circle. It looks like ellipse.
      • Now Kenta Tanaka and I are investigating the cause. If the cause is happening outside of mode cleaner, we can do something to remove the cause.

      • From the last week investigate, we are doubting it is ghost beam. k-log k-log k-log

    • VIS commissioning
      • VIS team is working the implementation of dumping filter, which is called local dumpling. Now they are discussing about the evaluation of the requirement value for dumpling.

      • Many glitches in the feedback signal were observed. k-log

  • f2f meeting
    • Status talk of DAC/DET (28th Sat. 9:00~?)

      • => Yamamoto

    • Contribution talks

      • Pastavi development (poster) => Yuzurihara

      • Gaussianity search (poster) => Morisue

20210816 (Mon.)

• Agenda
  • hveto analysis
  • O4 commissioning
  • KAGRA readiness
  • f2f meeting
• Minutes
  • hveto analysis
    • various clustering

      • (0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0)

    • old results

      • (0.1, 0.2)

  • O4 commissioning

    • FNC instability (klog#17748, klog#17865)

      • We are not investigating the cause of instability of Michelson fringes of FNC (green laser)
      • Fiber coupling at PSL room is the most reasonable candidate.
      • We need to investigate temperature environment around green laser more detailed.

    • MN Photo sensor noise (klog#17876)

      • It doesn't seem to be not a real ground motion because upper stage isn't shaked.
      • We doubt the electrical noise now.
      • O4 readiness
  • O4 readiness
    • #15 [Cont'd] State Vector Definition

      • Responsible: T. Yamamoto -> T. Yamamoto

    • #16 + #20 Segment production with short latency

      • Responsible: K. Kokeyama -> S. Oshino, T. Yamamoto

    • #17 [Cont'd ] Status web pages (summary pages, gw status, gw istat)

      • Responsible: S. Oshino -> S. Oshino

    • #18 [Cont'd] DQ event validation

      • Responsible: C. Kozakai -> K. Ueno, T. Yamamoto

    • #19 [Cont'd] GraceDB

      • Responsible: H. Tagoshi -> H. Tegoshi(?)

    • #21 [New] Data Category (at least CAT1) production

      • Responsible: !!!!!

    • #22 [New] RRT contribution

      • Responsible: H. Yuzurihara

20210802 (Mon.)

• Agenda:
  • hveto analysis
  • O4 commissioning and preparation
  • Hardware injection plan during O4
  • KAGRA O4 readiness

  • Proposal of O3GK DetChar paper slide

• Minutes:
  • hveto analysis
    • clustering test
      • Round winer doesn't change by clustering option.
      • Some kind of clustering is necessary but best parameter is not clear yet.
      • Kihyun will share the event time of clustered events.
      • We should check each event by spectrogram, Omega-scan, etc.
      • hveto with clustering will be also performed for 2 weeks day.
  • O4 commissioning
    • Omega-scan on Kashiwa has some error now. And
  • Hardware injection plan during O4
    • KAGRA CAL group is now gathering the plan of HWI during observations.
    • In LIGO case, in order to do HWI during obs., they need special and reasonable reasons.
    • KAGRA CAL also plan to adopt same procedures of the HWI management as LIGO.
    • If you have any HWI plan related to DET activities pls. share in DET telecons once.
    • We would like to discuss that the requested plans should be conducted during ER or obs.
  • O4 readiness
    • #15 [Cont'd] State Vector Definition

      • Responsible: T. Yamamoto -> T. Yamamoto

    • #16 + #20 Segment production with short latency

      • Responsible: K. Kokeyama -> S. Oshino, T. Yamamoto

    • #17 [Cont'd ] Status web pages (summary pages, gw status, gw istat)

      • Responsible: S. Oshino -> S. Oshino

    • #18 [Cont'd] DQ event validation

      • Responsible: C. Kozakai -> T. Yamamoto

    • #19 [Cont'd] GraceDB

      • Responsible: H. Tagoshi -> H. Tegoshi(?)

    • #21 [New] Data Category (at least CAT1) production

      • Responsible: !!!!!

    • #22 [New] RRT contribution

      • Responsible: H. Yuzurihara

20210726 (Mon.)

• Agenda:
  • hveto analysis
  • O4 commissioning
  • O4 readiness
• Minutes:
  • hveto analysis
    • Analyses with various clustering parameter are in progress. Kihyun will report in next telecon.
  • O4 commissioning
    • no updates

      • SummaryPages

      • lvalert
      • DET cluster
  • O4 readiness
    • It is preferable that the same person does not become multiple responsible person
    • As WP2021, DET tasks which is taken into account an effort follows readiness issues.
    • #15 [Cont'd] State Vector Definition

      • Responsible: T. Yamamoto -> T. Yamamoto

    • #16 + #20 Segment production with short latency

      • Responsible: K. Kokeyama -> S. Oshino, T. Yamamoto

    • #17 [Cont'd ] Status web pages (summary pages, gw status, gw istat)

      • Responsible: S. Oshino -> S. Oshino

    • #18 [Cont'd] DQ event validation

      • Responsible: C. Kozakai -> !!!!!

    • #19 [Cont'd] GraceDB

      • Responsible: H. Tagoshi -> H. Tegoshi(?)

    • #21 [New] Data Category (at least CAT1) production

      • Responsible: !!!!!

    • #22 [New] RRT contribution

      • Responsible: H. Yuzurihara

20210719 (Mon.)

• Agenda:
  • hveto analysis
  • O4 commissioning
  • O4 readiness
• Minutes
  • O4 commissioning
    • IMC-XARM commissioning

      • FNC control saturation klog17464

      • MC Oplev glitches and 120Hz line still exist (K1:VIS-MC{I,E,O}_TM_WIT_{P,Y})
      • Unstational noise excess on Green laser above 100Hz still exists (K1:ALS-
  • O4 readiness
    • #15 [Cont'd] State Vector Definition

      • Responsible: T. Yamamoto -> T. Yamamoto(?)

    • #16 + #20 Segment production with short latency

      • Responsible: K. Kokeyama -> S. Oshino, T. Yamamoto

    • #17 [Cont'd ] Status web pages (summary pages, gw status, gw istat)

      • Responsible: S. Oshino -> S. Oshino(?)

    • #18 [Cont'd] DQ event validation

      • Responsible: C. Kozakai ->

    • #19 [Cont'd] GraceDB

      • Responsible: H. Tagoshi -> H. Tegoshi(?)

    • #21 [New] Data Category (at least CAT1) production
      • Responsible:
    • #22 [New] RRT contribution

      • Responsible: H. Yuzurihara(?)

20210705 (Mon.)

• Agenda:
  • O3GK paper
  • white paper
  • O4 commissioning
• Minutes:
  • O3GK paper
    • Hveto was rerun with various parameters.
    • But there is no improvement in the veto efficiency.
  • white paper
    • Final version was released.
    • There was no additional comments from LV

    • LIGO Git

  • O4 commissioning
    • no report

20210628 (Mon.)

• Agenda
  • O3GK paper
  • white paper

  • O4 commissioning & preparation

• Minutes
  • O3GK paper
    • Uchikata-san and Narikawa-san got a consistent results with Kozakai-san's one.
    • hveto was performed with 0.1 duration.
    • There is no efficient channel/sensor for glitch veto.
      • Some parameters comes from LIGO's one.
      • So we need to find better parameters for KAGRA's data.
      • We also need prepare the more efficient sensors for O4 observing run
    • Kihyun is also performing the crosscheck. (1 or 2 weeks later he can report.)
  • white paper

    • Draft on LIGO Git

    • TY will be added a description about CAGMon until LVK DET call.
    • WP will be fixed at Ops call on 6/30 (?)

  • O4 commissioning & preparation

    • IMC commissioning

      • [Ongoing] Glitches on OpLev

        • Because of too many glitches, it's difficult to investigate one by one.
        • K1:VIS-MC{I,E,O}_TM_WIT_{P,Y} (MC Oplevs)

      • [Fixed] PLL noise coming from broken circuit klog17188

      • [Ongoing] PLL also has glitches (maybe) due to electrostatic discharge. klog17239

        • K1:ALS-{X,Y}_BEAT_ERR_OUT_DQ (error signal)
        • K1:ALS-{X,Y}_PLL_SLOW_DAQ_OUT_DQ (feedback signal)
      • [Ongoing] non-stational correlation between IMC/PLL and Microphone
        • K1:CAL-CS_PROC_IMC_FREQUENCY_DQ (calibrated frequency noise)
        • K1:IMC-SERVO_SLOW_DAQ_OUT_DQ (feedback signal of IMC)
        • K1:ALS-{X,Y}_PLL_SLOW_DAQ_OUT_DQ (feedback signal of PLL)
      • [Ongoing] station correlation between PMC and Microphone
        • Investigation about significance of coherence is ongoing.

20210621 (Mon.)

• Agenda
  • O3GK paper
  • O4 whitepaper

  • O4 commissioning & preparation

• Minutes
  • O4 white paper
    • The 1st version of the draft was submitted on June 17th.

      • LIGO Git

      • JGW-T-2112985

    • Final deadline is June 30th.
      • We can still do the miner fix.

  • O4 commissioning & preparation

    • IMC Commissioning

      • Omicron trigger searches for MC Oplevs were resumed (klog#17150).

        • K1:VIS-MC{I,E,O}_TM_WIT_{P,Y} (oplev signals)
        • K1:VIS-IMMT{1,2}_TM_WIT_{P,Y} (as a reference of circuit noise)

      • SummaryPages

        • Glitch trigger tabs are added.
        • Loudest glitches can be seen on Pastavi (only internal ICRR network)

20210614 (Mon.)

• Agenda
  • O3GK paper
  • O4 whitepaper

  • O4 commissioning & preparation

• Minutes
  • O3GK paper

    • plot

  • O4 white paper

    • draft

    • It's better to include PEM plans in commissions support section if exits.

  • O4 commissioning & preparation

    • IMC Commissioning
      • We have now four frequency noise signal (IMC, PMC, PLL-X, PLL-Y)
        • K1:CAL-CS_PROC_IMC_FREQUENCY_DQ (calibrated IMC as MHz)
        • K1:PSL-PMC_PZT_HV_MON_OUT_DQ (calibrated PMC as Volt at PZT amp.)
        • K1:ALS-X_PLL_SLOW_DAQ_OUT_DQ (calibrated Green-X as Volt at PZT)
        • K1:ALS-X_PLL_SLOW_DAQ_OUT_DQ (calibrated Green-Y as Volt at PZT)
      • PMC (always) and others (sometimes) have correlation with microphone signal
        • K1:PEM-MIC_PSL_TABLE_PSL1_Z_OUT_DQ (calibrated as Pascal)

      • OpLev signals have some glitches and are investigated now.

        • K1:VIS-MC{I,E,O}_TM_WIT_{P,Y}
        • Real SUS motion?, electrical glitches?, scattered light? etc.

    • SummaryPages

      • Updated PSL, PEM tabs.
        • PLL signals are available.

20210607 (Mon.)

• Agenda
  • O3GK paper
  • O4 whitepaper

  • O4 commissioning & preparation

• Minutes
  • O3GK paper
    • Preparing some plots about histgram and glitch rate of both KAGRA and GEO
  • O4 whitepaper

    • draft

  • O4 commissioning & preparation

    • CAGMon development

      • slide

        • Found correlation between wind power and BNS ranges
        • OMMT1 doesn't (maybe) have Oplev. It's better to confirm what kind of sensors were coneected.
        • BNS range channel has ~2min latency. It may become better results by considering the latency in BNS range calculation.
    • IMC commissioning

      • Noise investigation (klog)

      • Correlation between IMC and MIC sometimes increase in spite of no change in microphone spectra.
      • Coupling coefficients may be changed in time.
    • Cross check of hveto results.
      • Kihyun's (KISTI) and Chihiro's (Kamioka) results were confirmed as consistent each other.
      • For O4 observing run, Kashiwa environment is also important for increasing machine power.
      • Requirement of machine power should be estimated soon (but it's strongly depends on the situation of O4 joining)
      • We plan to use 100-200 aux. channels and it's very helpful to analyze them at the same time for each pipeline.
    • lvalert
      • no report

    • SummaryPage

      • no report

    • DetChar cluster

      • no report

20210531 (Mon.)

• Agenda
  • O3GK paper
  • O4 readiness

  • O4 commissioning & preparation

• Minutes
  • O3GK paper
    • Comparison with Uchikata-san's and GEO people's results is ongoing.

    • Kihyun is performing validation check of his results => He will report in next or 2 weeks later telecon.

  • O4 readiness
    • #15 [Cont'd] State Vector Definition

      • Responsible: T. Yamamoto -> T. Yamamoto(?)

    • #16 + #20 Segment production with short latency

      • Responsible: K. Kokeyama ->

    • #17 [Cont'd ] Status web pages (summary pages, gw status, gw istat)

      • Responsible: S. Oshino -> S. Oshino(?)

    • #18 [Cont'd] DQ event validation

      • Responsible: C. Kozakai ->

    • #19 [Cont'd] GraceDB

      • Responsible: H. Tagoshi -> H. Tegoshi(?)

    • #21 [New] Data Category (at least CAT1) production
      • Responsible:
    • #22 [New] RRT contribution

      • Responsible: H. Yuzurihara(?)

  • white paper 2021
    • No progress in draft.
    • Task list will be based on O4 readiness.
      • If there is another task plan, please let TY know (maybe CAGMon, ICA, pastavi development etc.).

  • O4 commissioning & preparation

    • LVAlert
      • no report

    • SummaryPages update

      • no report
    • DET cluster
      • no report
    • CAGMon development
      • no report

20210524 (Mon.)

• Agenda
  • O3GK paper

  • O4 commissioning & preparation

  • O4 readiness
• Minutes
  • O3GK paper
    • Discussion with GEO people is ongoing

  • O4 commissioning & preparation

    • MC circuit noise hunting
      • Current spectrum is too clean 1/f noise.
        • Frequency noise should shows 1/f spectrum.
        • But we haven't checked it's a real frequency noise (circuit noise etc.).
        • Nakano-kun said current spectrum is consistent with past measurements.
    • sound correlation

      • Investigating sound correlation with three microphones. slide

    • lvalert test
      • no report
    • DET cluster
      • no report

    • SummaryPages

      • added for some IMC signals and it work well.
  • White paper 2021

    • 2021

    • 2020

20210517 (Mon.)

• Agenda
  • KAGRA O4 readiness
  • LVK white paper 2021
  • O3GK paper
  • IMC commissioning
• Minutes
  • KAGRA O4 readiness
    • #15 [Cont'd] State Vector Definition

      • Responsible: T. Yamamoto ->

    • #16 [Cont'd] DQSEGDB capability

      • Responsible: K. Kokeyama ->

    • #17 [Cont'd ] Status web pages (summary pages, gw status, gw istat)

      • Responsible: S. Oshino ->

    • #18 [Cont'd] DQ event validation

      • Responsible: C. Kozakai ->

    • #19 [Cont'd] GraceDB

      • Responsible: H. Tagoshi ->

    • #20 [New] Segment production (merged with #16?)
      • Responsible:
    • #21 [New] Data Category (at least CAT1) production
      • Responsible:
    • #22 [New] RRT contribution
  • LVK white paper
    • Responsible:
    • What TY thought
      • All activities which are submitted as 2021 DET effort should be described on this documents.
      • It will be based on white paper 2020 and KAGRA O4 readiness.
      • Should clarify who will do each item (though personal name itself is not described on this documents).

      • Should show the rough timeline for R&D tasks.

  • O3GK paper
    • We need to continue to discuss with GEO people about GEO data analysis.
  • IMC Commissioning
    • Current IMC control signals on DGS are contaminated by circuit noise.
    • Important thing is that contamination is occurred only on DGS signals or also on real analog signals
    • Important channels
      • K1:IMC-SERVO_{MIXER,FAST,SLOW}_DAQ_OUT_DQ
      • K1:IMC-SERVO_NPRO_TEMP_BIAS_OUT_DQ

      • => These channels will be added to SummaryPages

  • O4 preparation
    • CAGMon development
      • no report
    • lvalert test
      • no report
    • DET cluster
      • no report

20210510 (Mon.)

• Agenda
  • KIW
  • O3GK paper
  • IMC Commissioning
  • O4 preparation
• Minutes
  • KIW

    - Status of KAGRA DET (20 min) => T. Yamamoto
    - Status of LIGO Detchar (20 min)
    - Status of Virgo Detchar (20 min)
    - Contributed Talk 1 - one slot from KAGRA (15 min) => H. Yuzurihara
    - Contributed Talk 2 - CAGMon tools (15 min)
    - Contributed Talk 3 - KISTI's data transfer and computing (15 min)

  • O3GK paper
    • hveto process for GEO600 was done.
  • IMC Commissioning
    • [PMC] Acoustic coherence (20-200Hz)
    • [IMC] Oscillation? (13-15MHz)
  • O4 preparation

    • SummaryPages

      • no report
    • lvalert
      • no report
    • DET cluster
      • no report

20210426 (Mon.)

• Agenda
  • O3GK analysis
  • O4 preparation
  • IMC Commissioning
• Minutes
  • O3GK analysis
    • Omicron analysis of GEO was finished.
    • Checking results is ongoing.
    • We need to convert segment information on DQSEGDB to xml format.
    • After checking omicron results, hveto analysis can be started.
  • CAG Mon development
    • CAG Mon was able to detect some correlation in O3GK data
    • Prioritize is not done yet.
      • prioritize can be decided by correlation coefficient value or total duration of correlation appearing
    • We need more time to develop CAGMon (before we move to review process.).
  • IMC Commissioning
    • Microphone self noise is evaluating now.
    • They will be installed in PSL room
  • Paper writing person(s) from DET
    • TY takes over from Kozakai-san.
  • summary of lvalert test for LVK DET telecon

20210419 (Mon.)

• Agenda
  • O3GK analysis

  • O4 preparation (LV alert, SummaryPages, CAGMon)

  • PMC/IMC noise hunting
• Minutes
  • O3GK analysis
    • GEO data analysis is started.
    • Channel list is prepared by GEO people.
  • PMC/IMC noise hunting
    • Sound noise
      • Frequency noise has coherence with microphone signal.
      • Sound noise affected to DARM sensitivity during O3GK.
      • Noise source and injection injection route should be investigated.
    • Electrical noise(?)
      • Accelerometer channel has coherence with frequency noise when PEM sensor turned OFF.
      • Circuit noise level is small, but some electrical coherence may exist.

20210408 (Thu.)

• Agenda
  • O3GK analysis

  • SummaryPage

  • LV alert slide

  • NDS2
  • IMC Commissioning
• Minutes
  • O3GK analysis
    • hveto re-analysis for a part of data was done.
      • round winner is same
      • significant is slightly difference, (using same conf. triggers, version, etc)
      • Next step is to check consistency of veto segment
    • GEO data
      • Analysis itself will be performed by KAGRA people
      • Understanding results will be performed by GEO (+KAGRA) people

20210401 (Thu.)

• Agenda
  • Progress of hveto analysis

  • DetChar cluster

  • lvalert

  • SummaryPages

  • RRT for O4
• Minutes
  • Announcement
    • New slot of DET meeting.

      • => Pending because TY cannot know free time slot yet. (7 doodle poll is running...).

    • hveto
      • Omicron test analysis is successful.
      • hveto doesn't run on m31 yet.
      • We need to KISTI environment.
    • lvalert
      • Waiting response from LV people.
      • We need realistic json format of GW alert.
      • Only for the purpose of launching pipelines, dummy format is also used.

    • SummaryPages

      • The 1st version of VIS tab is already available (Only Type-A and guardians).
      • Importing PSL tab from LIGO is already done.
      • But there is many difference of channel name convention.

20210325 (Thu.)

• Agenda
  • Progress of hveto analysis
  • GEO data analysis

  • SummaryPage construction

  • lvalert test
  • PMC/IMC commissioning
  • Meeting time in the next FY
• Minutes
  • Progress of hveto analysis
    • Consistency check still remains and it is solved yet.
  • GEO data analysis
    • Basic takeover is finished.
    • Uchikata-san and Narikawa-san can start to use Omicron and hveto.
    • But some error occurs on hveto@m31.
    • We should fixed environmental problem.

  • SummaryPage construction

    • The 1st version is already constructed on test directory.

    • We can apply it for product environment because current SummaryPage is not valid.

  • lvalert test
    • lvalert itself works well.
    • Next step is receiving alert.
    • We need to ask LIGO people about alert format etc.
  • PMC/IMC commissioning
    • Due to a lot of troubles, we haven't achieved IMC locked yet.
    • We may start some kind of commissioning from Mid or Late of April.
  • Meeting time in the next FY
    • TY will circulate doodle poll.

20210317 (Thu.)

• O3GK paper
  • hveto cross-check
    • Checking Omicron parameter remains.
    • Required re-run for whole two weeks.
  • veto segment production
    • Merging short segments is not required.
  • GEO data analysis
    • It can be done by someone form Tagoshi-san's group.
• O4 preparation
  • Kamioka cluster
    • It's pending due to the recovery work of power outage.

  • Takeover about Omicron, hveto, GlitchPlot

    • Takeover itself is done.
    • TY is finding candidate person of each pipelines toward O4.
  • Omega-scan test
    • Installing on Kashiwa
  • lvalert test
    • It's works well on k1det1

  • SummaryPage update

    • The 1st version of VIS page is constructed.
    • It's being checked by Miyo-kun.
  • IMC commissioning
    • It is not locked yet because of some troubles.

20210225 (Thu.)

• Agenda
  • Progress of O3GK paper
  • O4 preparation
• Minutes
  • Progress of O3GK paper
    • Chihiro re-analysis with proper science segment for omicron triggers.
    • A part of Kihyun's analysis is done.
    • Cross-check can be done. But not start yet.

  • DetChar cluster in Kamioka

    • http://klog.icrr.u-tokyo.ac.jp/osl/?r=16082

    • OS installation for master node was done.
  • Omega-scan test
    • Installation for Kashiwa cluster was done.
    • Error is occurred on gwdatafind.

  • SummaryPages

  • LVAlert

20210218 (Thu.)

• Agenda
  • Progress of O3GK paper
  • O3 data replay
  • O4 preparation
• Minutes
  • Progress of O3GK paper
    • hveto conf is same
    • segment is used as latest same science segments
    • definition of cutting end of segments is difference.
    • Channel list is used as on github's one.

    • Next step -> unifying cutting definition.

      • Kihyun will re-run omicron with new segment cutting definition
    • We need to merge veto segment from a lot of short ones to continuous one.
  • O3 data replay
    • Main purpose of O3 data replay is performing end-2-end test of low-latency pipelines (CAL, DET, DAS, etc).
    • LV will use real O3 data.
    • KAGRA provides simulated data (~80Mpc for BNS) because of too poor sensitivity of O3GK data.
    • We may need to inject GWs on software with consistency with LV's real events.
    • Frame work of software injection is already available.

  • SummaryPage

    • Updating VIS page.
    • It will be closed to LIGO's one.
  • LVAlert
    • k1det1 can be used for test.
    • Need personal account because we use personal DCC account for accessing GraceDB.
      • Ask LV people how to get common account on next LVK DET meeting.

20210204 (Thu.)

• Agenda
  • Progress of O3GK paper
  • O3 data replay
  • O4 requirement
• Minutes
  • Progress of O3GK paper

    • Omicron trigger transfer: Kamioka -> KISTI, it is postponed.

      • Young-Min asked KISTI administrator.
    • GW-search triggers have not been served yet.
  • O3 data replay
    • K1:OPS-SIM_GAUSS1_IN1 (simulated error signal)
    • K1:OPS-SIM_GAUSS1_OUT (simulated h(t) )
      • gaussian noise as floor level
      • Some spectral lines (cal lines, violin mode, power lines)
      • Simulated glitches.
    • K1:OPS-SIM_GAUSS3_OUT (simulated auxiliary channel)
  • O4 requirement
    • DQ state vector (Yamamoto)
      • Providing on real-time model.
    • Data Quality Report (Yuzurihara)
      • First step is to use lvalert in order to receive GW alert from GraceDB.
    • Transient Event validation (Kozakai)
      • Basic idea is omicron+hveto (same as O3GK)
      • Takeover should be done from Kozakai-san.
    • Category veto (Yamamoto)
      • At least CAT1 should be provided.
      • We need to convert to veto-definer file format.
    • Spectral lines investigation (Yokozawa)
      • Listing of VIS-derived peak frequencies.

20210128 (Thu.)

• Agenda
  • Report from Burst search
  • Binary range evaluation with C20 offline h(t)
  • Progress of O3GK paper
• Minutes
  • Report from Burst search
  • Binary range evaluation with C20 offline h(t)

    • slide

    • Multi-taper and Welch show similar results
    • Bayesline result is slightly different from results by other two methods.
    • Estimated values are enough for O3GK (search) paper.
    • LVK review of this work is necessary for publishing results.
  • Progress of O3GK paper

20210121 (Thu.)

• Agenda
  • Announcement

    • LVK DetChar call will be held (Jan. 25 19:00 JST, KST)

  • Progress of O3GK paper
  • CAGMon results
  • O3 Data replay
• Minutes
  • Progress of O3GK paper
    • Some difference between Kihyun's and Chihiro's results.
    • hveto setting should be tuned on conf file and re-run again.
    • GW search results will be provided 1-2 months later (?).
  • CAGMon results

    • slide

  • O3 data replay
    • LV requested the simulated data instead of O3GK data as KAGRA's data.
    • Auxiliary channels which has realistic coherence, coincidence etc are not available.
    • All multi-channel analyses cannot work well in such situation.
    • We need more discussion how do we join O3 data replay.

20210107 (Thu.)

• Agenda
  • Progress of O3GK analysis
  • O4 preparation
• Minutes
  • Progress of O3GK analysis
    • Analysis itself was finished.
    • Results by Chihiro and Kihyun are now comparing.

      • => Some conf. is still difference.

    • At least after finishing paper work, omicron triggers should be shared on Kashiwa cluster for remote site people.
  • O4 preparation
    • Model update will be finished soon.

      • => After model update, suspension commissioning will be started.

    • SummaryPages seems to be stopped.

      • => Because of the channel name update by VIS model changes.

      • => Current situation of real-time model is slightly complicated. ITMY: Old model, others: new model etc.

      • => After finishing CRY measurements, all suspension models are unified.

Past meeting

• 2020

• 2019