S2 / S3 Investigation Reports:

• Correlation studies (Nelson Christensen,  Sarah Vigeland)
  Sarah summarized the information on the new web site that tabulates known line correlations between AS_Q and auxiliary channels for 50 Hz and above. All three IFO's for S2 and S3 are being addressed. Only S2 H2 remains to be completed.
  
  
• Downward S2 calibration fluctuations leading to bursts in L1 (Gaby Gonzalez)
  Gaby described recent studies of downward fluctuations in measured S2 calibration strength that correlate with bursts in AS_Q. The DARM servo loop shape leads to a short-lived ~60 Hz oscillation if the loop gain drops suddenly, e.g., from a wobbly mirror in the recycling cavity that depresses sideband resonance. The loudest S2 inspiral candidate appears to be such an artifact. Gaby plans to identify all such calibration dips, using Xavi's demodulation data, in order to define intervals to veto with data quality flags.
  

DMT Software Status & Plans:

• Planning for "Detector Investigation Camp" following August LSC meeting (Keith Riles)
KR went over preparations for the upcoming detector investigation camp following the LSC meeting at Hanford.


• Status of DMT infrastructure:
 
• John Zweizig: Version updates, etc
  John spent last week at LLO, working on decatur and a new DMT E450 machine called clearwater, comparable to stone at LHO. Tom Evans has agreed to manage the DMT machines at LLO.  Ken Franzen has successfully installed the DMT on a grid machine at LLO. Junwei Cao at MIT has recently started work on DMT gridification. A number of major changes had to be made to accommodate the new gcc 3.4.1 compiler, including treatment of inline functions. The base class default destructor has been modified to print out statistics. SpectrumArchiver has been added to the CVS archive.
  
  
• Patrick Sutton: Calibration infrastructure
  Patrick will use xml files for storing the input data needed for the new EasyCalibrate class (references functions, epics variables, etc.). John has written an xml parser which Patrick will use to build a file reader. Daniel Sigg's old document on xml storage of calibration info is being used for guidance, with a few modifications.
  
 
• Status of DMT monitors under substantial development / revamping / debugging:

 
• John Whelan / Mark Cenac / Brian O'Reilly: StochMon
  No update.
  
  
• Tim Bodiya / Keith Riles: SpecMon
  Tim reported that a new channel selection option has been added to SpecMon. Automated writing of config files based on GUI-input is next on the list of tasks to be done. Tim will give a demo at the detector investigation camp.
  
  
• Ken Ganezer: seis_blrms
  Ken is working on an interpolation routine to eliminate filter glitches.
  
  
• Sergey Klimenko: BurstMon
  No update
  
  
• Steve Penn: BicoMon and BicoViewer
  There have been many changes "under the hood" of BicoViewer, including generation of output for viewing in movie mode. The GUI panel now gives the user an estimate of errors to expect for given parameter selections.
  
  
• Giovanni Santostasi: PulsarMon
  Giovanni was delayed recently by the theft of his laptop, but is now at work again. He has a modified version of SenseMon running that produces html summary info. He is using the ATNF catalog to choose pulsar parameters at start-up. For now, he is using Matlab for visualization, but will soon implement DMT viewer plots. He will attend the detector investigation camp to learn more about the DMT infrastructure.
  
  
• Rauha Rahkola: SuspensionMon
  Rauha has recently resumed work on SuspensionMon, in order to track down a bug in trending output.
  
  
• Natalia Zotov: PTMon
  John reported on Natalia's behalf that she has provided new documentation for the DMT monitor doc web page. John has asked her to investigate performance problems with the monitor.
  
  
• John Zweizig: LSCMon et al
  John has made extensive upgrades to PSLMon. He has added histograms to the glitch tool, which can be stored as root files or sent to the DMT viewer. He now keeps track of glitch duration, time between glitches, and glitch amplitudes. In addition, multiple glitches are now allowed in a single time stride. He is also looking at a measure of non-stationarity from the variance with time of variances. H2 shows significant non-stationarity by this definition, where micro-seismic oscillations are visible.
  
  

A.O.B.

• Next detchar meeting at Hanford August 17