R. Stone for the LSC Center for Gravitational Wave Astronomy Department of Physics and Astronomy University of Texas at Brownsville. GWDAW, Boston, MA,

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R. Stone for the LSC Center for Gravitational Wave Astronomy Department of Physics and Astronomy University of Texas at Brownsville. GWDAW, Boston, MA, Dec , 2007 DCC # Analysis of nonstationarity in LIGO S5 data using the NoiseFloorMon output : proposal for a seismic Data Quality flag. Preview

Just a quick reminder Tracking AS_Q and all seismic channels. Frequency bands : 0-16, 16-32, 32-64, 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 other monitors for comparison.

Location of results/ reports … People … Daily update is made (mostly automated/minimal supervision) and can be accessed at : Some analysis results/shift summaries can also be found at : People who have been involved at various stages of this work S. Mukherjee (algorithm and main code); Roberto Grosso (DMT code); R. Stone (present offline analysis).

Analysis and applications Analysis of data quality for important times, e.g. contribution to the burst detection checklist : gravity.phys.uwm.edu/cgi-bin/pcvs/viewcvs.cgi/*checkout*/bursts/projects/gravity.phys.uwm.edu/cgi-bin/pcvs/viewcvs.cgi/*checkout*/bursts/projects/detection/burstdetectionchecklist-gps html Development of a seismic data quality flag :

Seismic data quality flag for S5 Analysis of entire S5 data for H1, H2 and L1. Mark the GPS times of top 10 threshold crossings everyday. Insert in the DQ database with relevant frequency and channel information. Online analysis shows threshold crossings denoting nonstationary time periods. Record the maximum every minute marking the maximum excursion outside the threshold. Daily Analysis Seismic correlations Daily trend in the GW channel. Comparison with Q-scan Visualizing the data. Weekly trends in the GW channel. Monthly trends in The GW channel. DQFLAGSDQFLAGS