BurstMon trends for two waveforms

Conditions:

• code version: preliminary release, 04/27/2004
  
• input data: H1:LSC-AS_Q channel, S3 run, GPS start time: 751974320 sec
• data length: 4096 sec
  
• waveform #0: Sine-Gaussian 235 Hz, Q=9 (duration=0.0085 s)
• waveform #1:  Sine-Gaussian 555 Hz, Q=9 (duration=0.0036 s)
• time stride: 60 sec
• frequency resolution: 64 Hz
• time resolution: 1/128 sec
  
• number of simultaneous injections per time stride per waveform: 10
• number of repetitions per stride: 10
• number of different injection amplitudes for efficiency meausurements per time stride: 5
• total number of injections per waveform per time stride: 10x10x5=500
  

     The BurstMon is capable of producing  h₅₀ trends for more than one waveform at the same time. If waveforms are short (~10 msec) and its spectra located in different frequency bands then they do not interfere much with each other. The most time consuming calculations in BurstMon is cluster analysis which may be performed for all waveforms injected at once. Merging several injections in the same time interval allows to save significant amount of time. Adding one more waveform to the analysis doesn't change noticeably the computation time which is about 37 seconds per each 60 seconds time stride.

    The picture shows  h₅₀ calculated for simultaneous injection of Sine-Gaussian waveforms with central frequencies 235Hz and 555 Hz - dark blue and magenta lines correspondingly. For comparison the same analysis was performed separately for each of two waveforms. Results are plotted in yellow (SG 235 Hz) and light blue (SG 555Hz). The difference between pairs of lines for each waveform is well within errors range which is about 3% for SG 555 Hz and 5% for SG 235 Hz.

    It is interesting to note that series of  h₅₀ for these two waveforms (plotted in dark blue and magenta) show great statistical cross correlation  0.96.