Meetings

• Meeting time: 11:00-11:30 JST/KST on every Wednesday
• Meeting room: Zoom3

Agenda & Minutes

20240619 (Wed.)

• Agenda
  • Announcement
    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4b: O4b will now end 9 June 2025.

      • Ref.internal discussion, public announcements

      • Run plan(6/17 updated)

    • Power outage of ICRR Kashiwa campus on 2024/09/28 9:00~18:00 JST. The system-B cluster and Pastevi server will be down.
    • Conference

      • JPS: 2024/09/16(Mon)~09/19 @Hokkaidou univ.web

      • KAGRA f2f meeting: 2024/08/21(Wed)~23(Fri) @Tokyo City University
    • Announcements from Operations (Sawada)

    • KAGRA site report 06/07

      • new commissioning leader: Takafumi Ushiba
  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • cache file for O3GK and O4a
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
• Minutes

20240612 (Wed.)

• Agenda
  • Announcement
    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 10 April 2024.

      • Ref.internal discussion, public announcements

      • Run plan(5/23 updated)

    • Power outage of ICRR Kashiwa campus on 2024/09/28 9:00~18:00 JST. The system-B cluster and Pastevi server will be down.
    • Conference

      • JPS: 2024/09/16(Mon)~09/19 @Hokkaidou univ.web

      • KAGRA f2f meeting: 2024/08/21(Wed)~23(Fri) @Tokyo City University
    • Announcements from Operations (Sawada)

    • KAGRA site report 06/07

  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • cache file for O3GK and O4a
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
• Minutes
  • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • Computed the inspiral range from the strain channel with gwpy. Basically they used only the data in the science mode.
    • The histogram of the inspiral range changed. We can see the peak on the histogram.
  • pyCBC trigger list for O4a data (Narikawa and Uchikata)
    • They computed the triggers by using pycbc package from the strain data and packed in the xml.
    • The analyzed data include the IPC glitches. But, the chi-square could mitigated the glitch effect.

    • (Yuzu) Did you find the interesting or new triggers? --> no. Data seems stable.

    • (YamaT) Can you compare the trigger histogram with the one from Gaussian noise data? --> not yet. It's possible by replacing the input data with the generated Gaussian noise.

  • Glitch classification (Hsu Shih-Hong)
    • They took the average of the Q-spectrograms for each class. The obvious common features were not observed.
    • They tried to extract the common features on the Q-spectrograms.
    • It's important to take into account of the whitening effect. The whitening in gwpy could make the sharp glitch wider.

20240605 (Wed.)

• Agenda
  • Announcement
    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 10 April 2024.

      • Ref.internal discussion, public announcements

      • Run plan(5/23 updated)

    • Next 10yr Task Force Meeting: 2024/06/07 17:00JST, see [kagra 06570]
    • Power outage of ICRR Kashiwa campus on 2024/09/28 9:00~18:00 JST. The system-B cluster and Pastevi server will be down.

    • JPS registration: 2024/5/21~6/5 web

      • Does anyone have a presentation related to DetChar activity?

    • Announcements from Operations (Sawada)

    • KAGRA site report 05/22

  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • cache file for O3GK and O4a
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
  • isotropic stochastic search result (Chia-Hsuan)
• Minutes

  • In next JPS meeting(Sep.), YamaT plan to talk the detchat topics related to the web service (https://gwdet.icrr.u-tokyo.ac.jp/~controls/misc/html/).

  • Issue of monopolizing the CPU resources of system-B cluster. (this might be the third time in my memory)
    • Yuzurihara contacted the administrators to set some threshold or update the cluster settings so that the job submission system will manage the jobs submitted by many users effectively. Still no response from the administrators.

  • isotropic stochastic search result (Chia-Hsuan) slide

    • They analyzed the O4a KAGRA data with other detectors by using the pygwb pipiline, at CIT cluster.
    • They found the strange peak on the gating length. They shared the list of the gated time. The comparison between the list and the time of IPC glitches will be done soon.

    • They reported the coherence between KAGRA and LIGO (Livingston and Hanford). About the coherence of 960 and 961 Hz, yamaT pointed out that it came from the timing system. We use the same timing system between KAGRA and LIGO. See also alog.

      • AI for detchar: Collect the information of the remaining frequencies with coherence

    • (YamaT) How did you integrate the data for narrow-line analysis? --> all of the science mode

    • How was the gate process applied?

    • What is the good frequency band for the analysis? --> (YamaT) Comments from the calibration side: use 30~1000Hz.

  • Glitch classification (Chia-Jui) slide

    • They reported the glitches detected in O4a data can be classified into several classes by using unsupervised classification.

    • Q-transform plots are available git.

    • Yama-T commented on slack that the glitch effect might be widen by the whitening process.
  • O4a summary page (Uchikata)
    • We have decided to compute the inspiral range without the gwsumm. The computation is on-going.

20240529 (Wed.)

• Agenda
  • Announcement
    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 10 April 2024.

      • Ref.internal discussion, public announcements

      • Run plan(5/23 updated)

    • Next 10yr Task Force Meeting: 2024/06/07 17:00JST, see [kagra 06570]
    • Power outage of ICRR Kashiwa campus on 2024/09/28 9:00~18:00 JST. The system-B cluster and Pastevi server will be down.
    • Renewal of the account on KAGRA Main Data System: deadline 2024/05/31

    • JPS registration: 2024/5/21~6/5 web

      • Does anyone have a presentation related to DetChar activity?

    • KAGRA site report 05/22

  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • cache file for O3GK and O4a
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
• Minutes
  • Glitch analysis (Ishikawa)
    • The Omicron analysis for non-stationary noise around 360 Hz is on-going.
    • There might the 5-minutes fluctuation on the inspiral range. The analysis for other data will be done next.
  • Glitch analysis (Chia-Jui)
    • The Omicron analysis for the science mode excluding the IPC glitch is on-going.

    • (Guo Chin Liu) Do you have a flag to indicate the glitch time? --> Omicron provide the time of the glitch.

    • (Guo Chin Liu) What is the ratio in the science mode?

    • He found several characteristic types of glitches in KAGRA O4a data. For details, see slide.

    • klog

  • Hveto analysis (Syifa)
    • Hveto analysis with high pass filter is on-going.
  • Dedicated O4a summary page (Uchikata)

    • She found that the cache file for O4a data has the issue of overlapping or missing. She updated the cache file. Modification of cache files at system B

  • (Sawada) Matlab on the LDAS cluster will stop on the next maintenance day. If you want to use the Matlab on LDAS cluster, please contact with Sawada-san.

20240515 (Wed.)

• Agenda
  • Announcement
    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 10 April 2024.

      • Ref.internal discussion, public announcements

    • KAGRA detchar liaison to CBC group
      • Nami Uchikata as the new liaison between the CBC group and the KAGRA Detchar group.
    • KAGRA site report
  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • cache file for O3GK and O4a
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
• Minutes
  • Update contents of summary page (Oshino)

    • 4.5 Hz peak of IMC

    • Modified IMC page on SummaryPage

  • Hveto (Shifa)
    • By changing cutoff frequency of 8 or 12Hz, they checked the Hveto results and found the artificial glitches around 10Hz.
    • When they apply the HPF with 6 Hz or 4 Hz, the artificial glitches around 10Hz disappeared.
    • (YamaT) Do you know the design of HPF (butterworth?)?
    • (Uchikata) Minimum frequency of Hveto should be larger than the cutoff frequency of high pass filter in Omicron.
      • (YamaT) It might make the ripple.
    • (Yuzu) You can analysis the Omicron triggers with the higher cut-off frequency.
  • Glitch analysis (Ishikawa)

    • klog#29454 slide

    • (Chia-Jui) How do you set-up the Omicron configuration files? --> Same as commonly used one.

    • (Chia-Jui) What was the typical SNR of 300-500Hz? --> SNR 6~10? He didn't have a clear answer. He will check it.

  • Glitch analysis (Chir-Jui)
    • Omicron analysis without high pass filter was done.
    • In page 7, there were gaps due to the exceed of threshold of glitch rate. At that time, Omicron failed due to the error.
    • We confirmed the goal of the Detchar activity is to contribute the sensitivity or noise hunting of KAGRA.

20240508 (Wed.)

• Agenda
  • Announcement
    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 10 April 2024.

      • Ref.internal discussion, public announcements

    • Introduction of new comer
    • KAGRA site report
  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • cache file for O3GK and O4a
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
• Minutes

  • Omicron triggers at System B (Uchikata) klog

  • Update contents of summary page (Oshino)

    • Add shindo plots on SummaryPage

    • Update navigation bar on SummaryPage

  • line identification by fscan for kagra (Takahiro.S.Yamamoto) slide+supplement

    • What is the frequency resolution?

    • Segment duration of 1800 s is a typycal value in continuous wave search? --> yes

    • Is is posible to real-time monitoring of 60 Hz?
    • What is the advantage to used fscan?

    • The result for O4a data is available on the web. Due to computational costs, we didn't use aux. channels.

  • Hveto analysis (Kyujin, Kihyun, Syifa)
    • By adding the high pass filter, the artificial glitches appeared, although there is no such glitches in Uchikata-san's results.

  • Omicron on K1 O4a Data (Chia-Jui) slide

    • They proposed the way to identify the IPC glitches. --> The way to identify the IPC glitches was already established.

    • They found three classes of glitches in KAGRA data.
  • Dedicated summaru page for O4a KAGRA (Uchikata)
    • When we compute the inspiral range by reading the data from NDS server,

20240424 (Wed.)

• Agenda
  • Announcement
    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 10 April 2024.

      • Ref.internal discussion, public announcements

    • Introduction of new comer
    • KAGRA site report
  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • cache file for O3GK and O4a
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
• Minutes
  • Meeting on Next week will be canceled. Next meeting is 8 May.
  • Report of KIW and open data workshop#7 (Yuzurihara)
  • Computer cluster at Kamioka (Oshino)
    • We purchased the rack. In future, we move the computer in the rack.
  • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • Confirmation of the result is on-going.

    • The scale of histogram was changed. The apperance looks consistent with the dedicated summary page and the YamaT-san's result.

    • TODO: Inspiral range should be computed from the strain channel, not using the RANGE channel. That Range channel is used for the prompt report.
  • Hveto (Kyujin, Kihyun, Syifa)
    • The analysis result was explained in the meeting.
    • The high pass filter with 10 Hz or 15 Hz was applied for the Omicron analysis. The frequency range for Omicron should be tuned at the same time to mitigate the artificial noise in the Omicron triggers.
    • whale-like shape disappered in the histogram of Omicron triggers when we remove the segment of IPC glitch from the analysis.
    • Is there any suggestion to the interferometer experts? For example, which channels seems problematic.
  • Glitch investigation (Ishikawa)

    • Studying the Omicron pipeline and applying to the KAGRA's O4a data Progress report

  • Line investigation (Samurai)
    • Reading Fscan paper for past observation run (S6, O1, O2). The report will be done in the future meeting.

20240410 (Wed.)

• Agenda
  • Announcement

    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17 web

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web, Info. from GWOSC

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 10 April 2024.

      • Ref.internal discussion, public announcements

    • Introduction of new comer
    • KAGRA site report
  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
• Minutes
  • pyCBC trigger list for O4a data (Narikawa and Uchikata)

    • Use segment information of SCIENCE MODE + IPC glitch ==> ongoing

      • ongoing

    • Change data length 4096s -> 64s. Apply the high pass filter before splitting the data. ==> done

    • Estimate common PSD and use it for the analysis ==> done

    • Is it possible to output the trigger list in xml format?

      • https://gwpy.github.io/docs/latest/table/io/#ligo-lw-xml

20240403 (Wed.)

• Agenda
  • Announcement

    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17 web

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web, Info. from GWOSC

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 10 April 2024.

      • Ref.internal discussion, public announcements

    • Update of DQSEGDB server help ticket

    • KAGRA site report
  • Budget request
  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
• Minutes

  • Upgrade DetChar computers (YamaT)

    • waiting the update of workstation machines. I will take a few monthes.
  • DQR update (Yuzurihara)
    • no update.
  • Update contents of summary page (Oshino)
    • no update
  • Hveto (Kyujin)
    • Trouble on KISTI cluster.
  • pyCBC trigger list for O4a data (Narikawa and Uchikata)
    • Use segment information of SCIENCE MODE + IPC glitch

    • Change data length 4096s -> 64s. Apply the high pass filter before splitting the data.

    • Estimate common PSD and use it for the analysis
    • Is it possible to output the trigger list in xml format?

20240326 (Wed.)

• Agenda
  • Announcement

    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17 web

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web, Info. from GWOSC

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • ER16: It will nominally start at 1500 UTC (2400 JST) on 20 Mar 2024, and last for 2 weeks.

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 3 April 2024.

      • Ref.internal discussion, public announcements

    • KAGRA site report
  • Budget request
  • Progress reports

    • Upgrade DetChar computers (YamaT)

    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Related to segment files (Uchikata, Narikawa)
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
• Minutes
  • Budget request
    • New computers for replacing too old servers (k1det0, 1): 500k-yen x2
    • HDD for new systems: 10k-yen x10-20
  • Progress reports

    • Upgrade DetChar computers (YamaT)

      • Testing DetChar softwares can be started after the update of CDS workstations is completed.

      • Test of CDS workstation needs more time (hopefully by end of April)
    • DQR update (Yuzurihara)
      • No update
    • Update contents of summary page (Oshino)
      • No update
    • Related to segment files (Uchikata, Narikawa)
      • No update
    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa)

      • https://www.icrr.u-tokyo.ac.jp/~uchikata/Detchar/O4aSumm/gps/1368975618-1371337218/range/

      • SummaryPages process was executed on Kashiwa System-B.

      • Results were copied to the personal region of ICRR's Web server.
      • Finally this page will be opened only for LVK folks(?) on gwdet.
    • pyCBC trigger list for O4a data (Narikawa and Uchikata)
      • No update

20240306 (Wed.)

• Agenda
  • Announcement

    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17 web

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web, Info. from GWOSC

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • ER16: It will nominally start at 1500 UTC (2400 JST) on 20 Mar 2024, and last for 2 weeks.

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 3 April 2024.

      • Ref.internal short announcements (reminders), public announcements

    • LVK meeting on March 11-14 at Louisiana State University web

      • There is no fee for online participants

    • Update of member list for DetChar mailing list

    • KAGRA site report
  • Task list for the authorship 2024
  • Progress reports
    • O4a summary page(Uchikata)
      • After several attempts, the job was finished without errors. Another small problems,

20240228 (Wed.)

• Agenda
  • Announcement

    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17 web

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web, Info. from GWOSC

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • ER16: It will nominally start at 1500 UTC (2400 JST) on 20 Mar 2024, and last for 2 weeks.

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 3 April 2024.

      • Ref.internal short announcements (reminders), public announcements

    • LVK meeting on March 11-14 at Louisiana State University web

      • Early Registration is open until February 1
      • There is no fee for online participants

    • Update of member list for DetChar mailing list

    • KAGRA site report
  • Task list for the authorship 2024
  • Progress reports
• Minutes
  • Task list for the authorship 2024 (not fixed yet)

    1. Commissioning support : serving data monitoring tools for site commissioners.
      This task focuses on the support of the IFO lock trial and/or noise hunting based on the request from the interferometer commissioners.
      Support of analyses to measured data (e.g. noise projection to the DARM with measured noise and TFs) is also contained in this task.
      Specialized tasks for each subgroup should be applied for in the respective group task.
    
    2. Production and validation of Online Data Quality State Vector (for O4b/O5 preparation.
      This task focusing on providing the online DetChar products such as the online DQSV and managing various reliable online flags.
      Developing real-time and guardian codes for providing such flags should be contained in this task.
    
    3. Production and validation of Segment information for O4b/O5 preparation.
      This task focusing on providing low-latency/offline segments.
      Providing segment itself, evaluation of efficient channels to make segments, evaluating benefit of segments on GW searches
      and cooperation with CIT staffs to update segment contents on DQSEGDB are contained in this task.
    
    4. Construction of DQR (Data Quality Report) and igwn-alert framework for O4b/O5 RRT activities.
      This task focusing on providing contents from KAGRA to DQR web pages which is merged with LIGO, Virgo and KAGRA.
    
    5. Support of Data Analysis group to set Data Category criteria for O4b/O5 joint observing run.
      This task focusing on the support of the GW-search activities based on the each WG of DAC.
      Providing data category for the pipelines of each GW sources, providing veto segments 
      and other noise information such as identified spectral lines are also contained in this task.
    
    6. Managing DET computers and their environments.
      This task contains the computer environment construction for providing the DetChar products in the cadence of online/low-latency/offline.
      Managing dedicated servers for sharing DetChar products among LVK is also contained in this task.
    
    =====
    - Noise hunting in KAGRA commissioning.
        Obsolescent 
        Noise *hunting* without IFO (hardware) experts is unrealistic.
        In this meaning, the most of noise *hunting* can be covered in "Commissioning support”.
        If the tasks are related to the noise *finding* for the purpose of providing veto segment,
        they can be covered in “Support of Data Analysis”.

    • hveto analysis is contained in 1. in the case that there is some communication with onsite commissioners via klog etc.
      • It's also potentially contained in 5. in the case of providing veto-ed segments, correlated channels etc.

    • Providing Run SummaryPage is contained in 5.

      • Exact sentence as "Making Run Summary" should be added the description in 5.
  • Progress reports
    • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
      • start consideration about the system upgrade to new Debian system.
      • DET tools depend on the CDS tools and CDS tools are well managed on apt-repository.
      • Only a part of CDS tools can be available on Anaconda now.
    • DQR update (Yuzurihara)
    • Update contents of summary page (Oshino)
    • Combine DET computer resources into one DET cluster at Kamioka site
    • Related to segment files (Uchikata, Narikawa)

    • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa) O4a (LV)

    • pyCBC trigger list for O4a data (Narikawa and Uchikata) O4a (H1)

      • 4000s data analysis is ongoing.
        • Processed time is a few hours
      • Used template is changed from BBH to BNS.
        • Trigger behavior is changed by used templates.
      • Generated triggers are in the text format.

        • If LIGO's XML (LW XML?) is available, it may be very easy to make various plots on SummaryPages.

20240221 (Wed.)

• Agenda
  • Announcement

    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17 web

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • ER16: It will nominally start at 1500 UTC (2400 JST) on 20 Mar 2024, and last for 2 weeks.

      • O4b: We plan to commence O4b at 1500 UTC (2400 JST) on 3 April 2024.

      • Ref.internal short announcements (reminders), public announcements

    • LVK meeting on March 11-14 at Louisiana State University web

      • Early Registration is open until February 1
      • There is no fee for online participants

    • Update of member list for DetChar mailing list

    • KAGRA site report (Yuzurihara)
  • Commissioning support + tasks related to O4a
    • O4a for KAGRA : 2023/05/25 0:00 JST (=2023/05/24 15:00UTC) ~ 2023/06/21 8:00 JST
    • Event validation (YamaT)
    • Online data quality state vector (YamaT)
    • Tool to evaluate Gaussianity (Yamamura)
    • Scattered light noise (Yamamura)

      • Investigation of scattered light noise in O4a plots

    • Pastavi update (Yuzurihara)
    • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)
    • Classification of glitch noise (Shikano, Oshino)
    • IPC glitch
    • line noise study (Samurai)
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)
  • Update contents of summary page (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Related to segment files (Uchikata, Narikawa)

  • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa) O4a (LV)

  • pyCBC trigger list for O4a data (Narikawa)
• Minutes

20240214 (Wed.)

• Agenda
  • Announcement

    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17 web

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • ER16: It will nominally start on 13 Mar 2024, and last for 2 weeks. (Note that ER16 will begin in the middle of the next LVK meeting at LSU, 11-14 March.)

      • O4b: We plan to commence O4b at 1600 UTC (2500 JST) on 27 Mar 2024.

      • Ref.internal short announcements (reminders), public announcements

    • White paper and task list for 2024 git repo

    • LVK meeting on March 11-14 at Louisiana State University web

      • Early Registration is open until February 1
      • There is no fee for online participants

    • Update of member list for DetChar mailing list

    • KAGRA site report (Yuzurihara)
  • Commissioning support + tasks related to O4a
    • O4a for KAGRA : 2023/05/25 0:00 JST (=2023/05/24 15:00UTC) ~ 2023/06/21 8:00 JST
    • Event validation (YamaT)
    • Online data quality state vector (YamaT)

      • Sanity check of DAC saturation bit provided by a new model

    • Tool to evaluate Gaussianity (Yamamura)

      • Investigation of scattered light noise in O4a

    • Scattered light noise (Yamamura)
    • Pastavi update (Yuzurihara)
    • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)
    • Classification of glitch noise (Shikano, Oshino)
    • IPC glitch
    • line noise study (Samurai)
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)
  • Update contents of summary page (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Related to segment files (Uchikata, Narikawa)

  • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa) O4a (LV)

    • O4a summary page

  • pyCBC trigger list for O4a data (Narikawa)
• Minutes
  • Online data quality state vector (YamaT)

    • Sanity check of DAC saturation bit provided by a new model

    • We need same test for ETMY model.
  • Scattered light noise (Yamamura)

    • Investigation of scattered light noise in O4a

    • (oshino) why the double bounce occurred?
    • (yamaT) it's better to check both the feedback and error signal (OUT_DQ and IN1_DQ).
    • (oshino) PD signal might be helpful in the investigation. In POP_FORWARD, the scattered light was seen in the past.
  • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)

    • KAGRA O4a hveto results (0524 ~ 0606) KAGRA O4a hveto results (0607 ~ 0619)

    • hveto shows the many triggers on the time the scattered light noise appeared
    • (yamaT) IPC glitch was taken care in this analysis? It's better to use SCIENCE segment + IPC glitch segment.
    • It is interesting to compare the glitch rate and the analysis result with and without IPC glitch segments.
    • Yuzurihara shared that segment with Kihyun.

  • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa) O4a (LV)

    • O4a summary page

  • pyCBC trigger list for O4a data (Narikawa)
    • (yamaT) can we include the trigger information by pycbc, in the summary page?

20240207 (Wed.)

• Agenda
  • Announcement

    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17 web

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • ER16: It will nominally start on 13 Mar 2024, and last for 2 weeks. (Note that ER16 will begin in the middle of the next LVK meeting at LSU, 11-14 March.)

      • O4b: We plan to commence O4b at 1600 UTC (2500 JST) on 27 Mar 2024.

      • Ref.internal short announcements (reminders), public announcements

    • White paper and task list for 2024 git repo

    • LVK meeting on March 11-14 at Louisiana State University web

      • Early Registration is open until February 1
      • There is no fee for online participants

    • Update of member list for DetChar mailing list

    • KAGRA site report (Yuzurihara)
  • Commissioning support + tasks related to O4a
    • O4a for KAGRA : 2023/05/25 0:00 JST (=2023/05/24 15:00UTC) ~ 2023/06/21 8:00 JST
    • Event validation (YamaT)
    • Online data quality state vector (YamaT)
    • Tool to evaluate Gaussianity (Yamamura)
    • Scattered light noise (Yamamura)
    • Pastavi update (Yuzurihara)
    • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)
    • Classification of glitch noise (Shikano, Oshino)
    • IPC glitch
    • line noise study (Samurai)
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)
  • Update contents of summary page (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Related to segment files (Uchikata, Narikawa)

  • Provide the dedicated summary page for O4a of KAGRA (Uchikata) O4a (LV)

• Minutes
  • Online data quality state vector (YamaT)

    • model update of k1detdq0 This is bug fix of production of online data quality state vector related to DAC saturation.

    • The hardware test will be done this week an next week.
  • Tool to evaluate Gaussianity (Yamamura)

    • Relaunch of GauCh

    • The codes were uploaded at git repo. The preparation of brief documentation is ongoing.

  • Classification of glitch noise (Shikano, Oshino)
    • They restarted this project. The report will be done soon.

  • Provide the dedicated summary page for O4a of KAGRA (Uchikata) O4a (LV)

    • They tested the conda environment and configuration files for the production of the summary page. Except for the specific short time, they can generated the O4a summary page including duty cycle and inspiral range.
  • Generation of trigger list by pycbc (Narikawa)
    • Code test is ongoing by using the short 4096s data of O4a. The timeseries of chi square looks strange. They plan to apply the high pass filter, instead of window function.
    • (yamat) How do you decide clustering length?
    • (Narikawa) By software injection, we can evaluate how the SNR spreads and determine the clustering length.

20240131 (Wed.)

• Agenda
  • Announcement

    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17 web

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • ER16: It will nominally start on 13 Mar 2024, and last for 2 weeks. (Note that ER16 will begin in the middle of the next LVK meeting at LSU, 11-14 March.)

      • O4b: We plan to commence O4b at 1600 UTC (2500 JST) on 27 Mar 2024.

      • Ref.internal short announcements (reminders), public announcements

    • White paper and task list for 2024 git repo

    • LVK meeting on March 11-14 at Louisiana State University web

      • Early Registration is open until February 1
      • There is no fee for online participants

    • Update of member list for DetChar mailing list

    • LVK MoA survey summary LIGO DCC

    • KAGRA site report (Yuzurihara)
  • Commissioning support + tasks related to O4a
    • O4a for KAGRA : 2023/05/25 0:00 JST (=2023/05/24 15:00UTC) ~ 2023/06/21 8:00 JST
    • Event validation (YamaT)
    • Tool to evaluate Gaussianity (Yamamura)
    • Scattered light noise (Yamamura)
    • Pastavi update (Yuzurihara)
    • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)
    • Classification of glitch noise (Shikano, Oshino)
    • IPC glitch
    • line noise study (Samurai)
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)
  • Update contents of summary page (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Related to segment files (Uchikata, Narikawa)

  • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa) O4a (LV)

• Minutes
  • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)

    • O4a hveto results

  • line noise study (Samurai)

    • slide

    • Is it possible to set the initial parameter in advance, such as prominence and height?
    • In future, it is better to extend the fft length to be longer for fine frequency resolution.
  • Update contents of summary page (Oshino)

    • Update configuration file on SummaryPage

  • Related to segment files (Uchikata, Narikawa)

    • Glitch rate for O4a

  • provide the dedicated summary page for O4a of KAGRA (Uchikata and Narikawa) O4a (LV)

    • The attempt to generate summary page is on system-B. For reading data, NDS2 server is helpful.

20240124 (Wed.)

• Agenda
  • Announcement
    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web

    • LIGO-Virgo-KAGRA detchar joint meeting
      • tileslot: onthly, 23:00 JST (14:00 UTC) or 6:00 JST (21 UTC)

      • Last meeting on Nov. 15 23:00 JST (14:00 UTC) wiki

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4a: It will end at 1600 UTC on 16 Jan 2024. LLO will end O4a observing early, at 1400 UTC.

      • ER16: It will nominally start on 13 Mar 2024, and last for 2 weeks. (Note that ER16 will begin in the middle of the next LVK meeting at LSU, 11-14 March.)

      • O4b: We plan to commence O4b at 1600 UTC (2500 JST) on 27 Mar 2024.

      • Ref.internal short announcements (reminders), public announcements

    • Information of O4a wiki page

    • White paper and task list for 2024 git repo

    • LVK meeting on March 11-14 at Louisiana State University

    • Update of member list for DetChar mailing list

    • KAGRA site report (Yuzurihara)
  • Commissioning support + tasks related to O4a
    • O4a for KAGRA : 2023/05/25 0:00 JST (=2023/05/24 15:00UTC) ~ 2023/06/21 8:00 JST
    • Event validation (YamaT)
    • Tool to evaluate Gaussianity (Yamamura)
    • Scattered light noise (Yamamura)
    • Pastavi update (Yuzurihara)
    • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)
    • Classification of glitch noise (Shikano, Oshino)
    • IPC glitch
    • line noise study (Samurai)

      • Peak identifications web

  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)
  • Update contents of summary page (Oshino)
    • run Omicron at Kamioka site and refresh the Omicron plots on summary page during O4a period
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Script to generate segment files (Uchikata, Narikawa)
  • Related to segment files (Uchikata, Narikawa)

  • provide the dedicated summary page for O4a of KAGRA? O3a (LV)

• Minutes
  • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)

    • O4a hveto results

  • Update contents of summary page (Oshino)

    • Modified configuration file on SummaryPage

20240117 (Wed.)

• Agenda
  • Announcement
    • KAGRA international workshop (KIW11)@Taiwan: 2023/04/16-17

    • Gravitaional wave open data workshop (GWODW7)@Taiwan: 2023/04/18-20 web

    • LIGO-Virgo-KAGRA detchar joint meeting
      • tileslot: onthly, 23:00 JST (14:00 UTC) or 6:00 JST (21 UTC)

      • Last meeting on Nov. 15 23:00 JST (14:00 UTC) wiki

    • O4a/preO4b(not call it as postO4a)/ER16/O4b schedule:

      • O4a: It will end at 1600 UTC on 16 Jan 2024. LLO will end O4a observing early, at 1400 UTC.

      • ER16: It will nominally start on 13 Mar 2024, and last for 2 weeks. (Note that ER16 will begin in the middle of the next LVK meeting at LSU, 11-14 March.)

      • O4b: We plan to commence O4b at 1600 UTC (2500 JST) on 27 Mar 2024.

      • Ref.internal short announcements (reminders), public announcements

    • Information of O4a wiki page

    • White paper and task list for 2024 git repo

    • LVK meeting on March 11-14 at Louisiana State University
    • KAGRA site report (Yuzurihara)
  • Commissioning support + tasks related to O4a
    • O4a for KAGRA : 2023/05/25 0:00 JST (=2023/05/24 15:00UTC) ~ 2023/06/21 8:00 JST
    • Event validation (YamaT)
    • Tool to evaluate Gaussianity (Yamamura)
    • Scattered light noise (Yamamura)
    • Pastavi update (Yuzurihara)
    • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)
    • Classification of glitch noise (Shikano, Oshino)
    • IPC glitch
    • line noise study (Samurai)

      • Peak identifications web

  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)
  • Update contents of summary page (Oshino)
    • run Omicron at Kamioka site and refresh the Omicron plots on summary page during O4a period
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Script to generate segment files (Uchikata, Narikawa)
  • Related to segment files (Uchikata, Narikawa)

  • provide the dedicated summary page for O4a of KAGRA? O3a (LV)

• Minutes
  • Tool to evaluate Gaussianity (Yamamura)
    • Gauch recently looks not running. There is no html page linked from summary page. We will check the details later.
  • DQR update (Yuzurihara)
    • I asked the remote help to Derek. I'm submitteing the application for the ICRR computer account.
  • IPC glitch

    • Summary of recent segment for IPC glitch (2023/11~12)

  • Noise hunting by machine learning and Hveto (Kyujin, Kihyun, Syifa)

    • 2023-05-24 ~ 06-07 O4a hveto results

    • The analysis for the remained date will be
  • Update contents of summary page (Oshino)

    • Modified configuration files of SummaryPage

    • Modified configuration file on SummaryPage

Past meeting

• 2023

• 2022

• 2021

• 2020

• 2019