1. S5 Data Quality John Zweizig LIGO/Caltech Hanover, October 25, 2007

2. Data Overview Running time: GPS 815155200 – 875232000 (60076800s, 695d)‏ Single IFO science mode: »H1: 46670444s, 540d, 77.8% »H2: 47001597s, 544d, 78.2% »L1: 39463778s, 457d, 65.7% Double coincidence science mode »H1 · H2: 42856054s, 496d, 71.3% »H1 · L1: 34234457s, 396d, 57.0% »H2 · L1: 33664680s, 390d, 56.0% Triple coincidence science mode »H1 · H2 · L1: 31737338s, 367d, 52.8%

3. Range Distribution

4. Range by Calendar Week

5. Data Quality Segments Not all data created equal - So... DQ segments »Generated online / off-line »More will be defined as detector characterization work continues »No implied recommendation –Chosen segment appropriate for an analysis! –Check safety »More information available from: http://gallatin.physics.lsa.umich.edu/~keithr/S5DQ/flaginfo.html

6. Segment Database Segment DBs at CIT, LHO, LLO »local insertion »Automatic synchronization between databses Segment information »start-time, end-time »Active (asserted/not asserted)‏ »provenance »version (v99 is combination of all active versions)‏ Insertion, interrogation tools: »LSCdataFind »Segwizard

7. Category 1: No Data / Bad Data As close to a no-brainer as it comes: »IFO not in lock (or in triggered mode)‏ »No raw data »Data not read out correctly Most eliminated from Run Statistics on Slide 1

8. Instrumental Glitches Digital-loop overflows »SEVERE_LSC_OVERFLOW »ASI_CORR_OVERFLOW Other direct glitches »TCS Glitch »Calibration line glitches »OSEM. optical lever glitches (damping servo)‏

9. Other Segments Wind: »Wind_Over_30MPH » HURRICANE_GLITCHINESS Seismic »TRAIN_LIKELY »DEWAR_GLITCH »EARTHQUAKE_GLITCHINESS Electricity and Magnetism »POWERMAINS_DISRUPTION »POWERMAIN_GLITCH »POWMAG »SEIS_DARMERR_5_7HZ IFO Running States »PRE_LOCKLOSS_nn »H[12]_Not_Locked »H[12]_LOCKLOSS »H[12]_LOCKGAIN IFO related »LIGHTDIP_nn_PERCENT »SIDECOIL_ETM[XY][_RMS_6H Z] »CONLOG_SICK »CALIBRATION_BAD »BAD_SENSING »BAD_SERVO

10. Photo-diode Consistency 4 AS photo-diodes: redundant measure of AS port signal Demodulated and recorded at 256Hz Inconsistency can indicate »Dust in light path »Single PD readout error

11. PD Consistency Test Chi²: »Calculated at each sample. »χ²=Σ(α i PD i – ¼ΣPD j )² »Averaged over 4s stride »χ² max is largest in 1 minute

12. Environmental Effects H1 periodic (~6Hz) glitches Assumed mechanism: »Several seismic-stack resonances near 6Hz »Pendulum “damping” worsens sideways motion Tagging techniques »ETM[XY] side coil read-back »ETM[XY] side overflows »DARM_ERR 4-7 Hz Band »ETM[XY] side sensor 6Hz RMS

13. ETMX 6Hz RMS Flagging H1 DARM_ERR glitch significance plotted vs. log RMS in ETMY 5.8- 6.2Hz Band RMS read from minute trends – 1 minute granularity Clear population of glitches at very high significance (~10 4 )‏ Significance doesn't increase with increasing RMS! Possibly overflow effect. ETMY_RMS_6HZ flag from this Should be reanalyzed with better granularity.