NoiseFloorMon Upgrade

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NoiseFloorMon Upgrade
Soma Mukherjee Roberto Grosso Center for
Gravitational Wave Astronomy Department of
Physics and Astronomy University of Texas at
Brownsville.
Detector Characterization Telecon October 6,
2006 DCC
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Changes made

• Tracking AS_Q.
• Frequency bands 0-20, 20-100, 100-200 and
  200-2048 Hz.
• Percentage threshold crossings are recorded and
  minute trends stored.
• Offline analysis
• - looking at trends on a daily basis
• comparison with BurstMon output
• - activities in different frequency bands
• - correlation with SenseMon output

• Tracking AS_Q and all seismic
• channels.
• Frequency bands 0-16, 16-32,
• 32-64, 64-128 Hz.
• Minute trends of max threshold
• crossing and cross correlations
• with the seismic channels stored.
• Offline analysis
• looking at trends on a daily basis
• studying cross correlations with
• the seismic channels
• -Looks up Q-scan for further information.

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Location of results/ reports People

• Daily update is made (mostly
  automated/minimal supervision) and can be
  accessed at
• www.phys.utb.edu/soma/MNFTresults/NoiseFloorMon_d
  aily.html
• Some analysis results/shift summaries can
  also be found at
• www.lsc-group.phys.uwm.edu/glitch/investigations/s
  5index.html
• People who have been involved at various stages
  of this work
• Roberto Grosso (DMT code)

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Typical output
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Percentage threshold crossing trends
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Threshold crossings in different frequency bands
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Correlating with BurstMon pixel fraction
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Comparison with BurstMon 50 hrss at 100, 235 and
555 Hz
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Experience with Noise Floor Mon so far

• NoiseFloorMon tracks the slow variations of the
  noise floor as
• opposed to many existing monitors that measure
  sudden changes
• or transients. Thus attempts at making a direct
  correlation may not
• prove most effective.
• Parameters used in other monitors e.g. BurstMon
  do not
• necessarily match those used in NoiseFloorMon.
• Percentage threshold crossing is not necessarily
  the best measure to
• reflect the output of the monitor.

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New figures