GlitchPlot

This project is for glitch and lockloss study. You can see the result on Yuzu Summary.

Feedback from users are very welcome ! Please inform C. Kozakai and H. Yuzurihara.

Recent update

• 7/19 Glitch events in ER on 7/13 are reprocessed. Yuzu summary

• 7/13 SNR thresholds are optimized to ER trigger rate.
• 7/12 Trigger channel is changed to MICH optimized set.

Old information is more below.

The latest trigger channel list

7/19~ (only 0:00~8:00, daytime events are vetoed)

7/13 (MICH ER)

6/8 during ER

Old information is more below.

Overview

The main purpose is to study glitches and lock loss by visual inspection. Also, collecting information for glitch database is done through voting form for each glitch event. Using the result, we aim to do noise hunting, glitch characterization, and labeling for machine learning application. Here is slides describing how to use: slides

GlitchPlot uses trigger information provided by Omicron. GlitchPlot does clustering of the triggers and summarize the trigger information for each events based on the Omicron output.

For each events, plots for triggered channel and relevant channels are provided on Yuzu Summary. The relevant channels are basically chosen from

• Trigger channel
• Unsafe channels
• Important upstream channels
• Relevant VIS channels
• PEM near the trigger channel sensor

Using Kozapy batch codes, following plots are provided:

• Time series
• Spectrum before trigger and after trigger
• Spectrogram
• Coherencegram with trigger channel
• Q-transform (Under testing)

The parameter for plots are determined based on trigger information. Also, lock state summary around the trigger time is provided.

Specification detail

Trigger clustering

For the trigger clustering method, please refer p3 of slides.

Plot channel list

For the exact channel list for each trigger, please refer $channelname.dat in GlitchPlot github.

Plot parameter

For the exact method for plot parameter determination, please refer plotter.py and condor_jobfile_plotter.sh in GlitchPlot github. The intent and the variable name in the shell script is as follows.

• Time series
  • GPS start time ($gpsstart), end time ($gpsend)
  • Output directory ($outdir)
  • Channel ($chlist[@])
  • Lock state segment bar: flag($lock), guardian channel($lchannel), guardian value($lnumber), segment bar title($llabel)
  • Data file type ($data)
• Spectrum
  • List of GPS start time ($gpsstarts30[@]), end time ($gpsend30[@])
  • Output directory ($outdir)
  • Channel ($chlist[@])
  • FFT length ($fft30)
• Spectrogram
  • GPS start time ($gpsstart), end time ($gpsend)
  • Output directory ($outdir)
  • Channel ($chlist[@])
  • Lock state segment bar: flag($lock), guardian channel($lchannel), guardian value($lnumber), segment bar title($llabel)
  • FFT length ($fft)
  • Stride ($stride)
  • With and without whitening
• Coherencegram
  • GPS start time ($gpsstart), end time ($gpsend)
  • Output directory ($outdir)
  • Channel ($channel) $chlist[@]
  • Lock state segment bar: flag($lock), guardian channel($lchannel), guardian value($lnumber), segment bar title($llabel)
  • FFT length ($fft)
  • Stride ($stride)
• Q-transform (Under testing. GWpy default parameter is used.)
  • GPS start time ($gpsstart), end time ($gpsend)
  • Output directory ($outdir)
  • Channel ($chlist[@])
  • Lock state segment bar: flag($lock), guardian channel($lchannel), guardian value($lnumber), segment bar title($llabel)
• Lock segment summary
  • GPS start time ($gpsstart), end time ($gpsend)
  • Output directory ($outdir)
  • Channel ($channel)
  • Trigger time ($gpstime) and duration ($max_duration)

Source code

GlitchPlot github.

Master branch: On Kamioka server, plotter.sh runs by crontab every 15 min. plotter.py is called. it gives clustered Omicron trigger information as a text file. The text files are sent to Kashiwa server by rsync.

kashiwa branch: On Kashiwa sercer, GlitchPlot.sh runs by crontab every 15 min. Using text file sent from Kamioka, condor_jobfile_plotter.sh runs to throw jobs into condor to make plots.

Info log

Trigger channel list log

7/19~ (only 0:00~8:00)

7/13 (MICH ER)

7/12~ and 7/13 11:30~24:00

7/10~

7/5~7/9 (buggy setting)

6/8 during ER

6/12~7/5

6/7~6/12

Update log

• 7/19 Glitch events in ER on 7/13 are reprocessed. Yuzu summary

• 7/13 SNR thresholds are optimized ER trigger rate.
• 7/12 Trigger channel is changed for MICH optimized set.
• 7/10 Changed SNR threshold.
• 7/9 Bug fix for SNR threshold lowering.
• 7/5 SNR threshold is lowered during 0am-8am. Instead, daytime events are all rejected.
• 7/5 Missing plot for PEM trigger channel is fixed.
• 7/4 ER events are reprocessed.
• 7/4 Started this wiki.