Engineering Run 2 (JST 2019/7/13)

Contents

Data related

KAGRA full data
- m31:/data/full : Full KAGRA data
Low latency data
- m31:/data/ll_merged/ : Low latency data packed in 4096 seconds
- hydra:/data/ll_merged/ : Low latency data packed in 4096 seconds
- hydra: /data/ll-sharing/shm/llhoft/ : Low latency data (1 second) dumped from shared memory (retained only for 8192 seconds)
channel name
- From ER2 (DetChar)
- K1:CAL-CS_PROC_MICH_DISPLACEMENT_DQ (We used this channel.)
- K1:CAL-CS_PROC_IMC_FREQUENCY_DQ
Low latency data channels
- K1:DCS-CALIB_STRAIN_C10 16384
- K1:DCS-CALIB_STATE_VECTOR_C10 16
- K1:CAL-CS_PROC_IMC_FREQUENCY_DQ 16384
lock flag
- K1:GRD-LSC_LOCK_STATE_N = 157
data quality vector
- definition
- We cbc group should check the second bit is 1.
CBC lock segments
- We checked lock flag of each data and collected the locked data. We considered lock segments by file units for convenience. If compared with lock segment(DetChar), this lock segment is small slightly.
  
  #
  
  start GPS
  
  stop GPS
  
  duration
  
  1
  
  1247024288
  
  1247043616
  
  19328

Check the available locked data (done)
- Summarize the data length (done)
Estimate power spectrum density (done)
- Summarize information in pdf (done)
Generate lock list and segment list (done)
Generate template bank (skipped)
- How many waveforms we need? (skipped)
Search signals by matched filter and chi^2 (done)
Summary the output of search (done)
- histogram of SNR (done)
- glitch list(GPS, JST, mass, ISCO frequency, duration) (done)

Summary of locked data CBC locked segment
Averaged PSD JGWdoc
- Power spectrum density (PSD) is averaged over 1 sec chunks by taking median.
Calculation time to search for signals
- Read 500 sec data : < 1 min
- Estimate PSD : 2~3 min.
- matched filter+chi^2 with single waveform (not bank) : < 1 min
Histogram of detection statistics JGWdoc
- If data is Gaussian, <snr>=1.
Time series of detection statistics JGWdoc
- waveform : 1.4 - 1.4 Msun
- Beginning and ending 50 sec data were removed from the result.
- We uploaded the 3 kinds of time series results which were maximized over rho(matched filter), chi square, rhohat(detection statistics) during 1 second window.
  - We added time series of rho and chi square, because time series of rhohat don't contain the information of the glitch.
- File names are
  - "cbc_max_rho_ER2.txt" (this data indicates the time when data contains high power)
  - "cbc_max_chi2_ER2.txt" (this data indicates the time when data contains high power in specific frequency band)
  - "cbc_max_rhohat_ER2.txt" (this data indicates the time when data "might" contains gravitational wave signal)

#	start GPS	stop GPS	duration
1	1247024288	1247043616	19328