John Zweizig LIGO/Caltech

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Presentation transcript:

John Zweizig LIGO/Caltech S4 Data Quality John Zweizig LIGO/Caltech LIGO-G050197-00-E LSC Collab, LLO, March 22,2005

Data Quality Preparation Many sources ELOG CDS/Epics channels (state vector, overflow counts, etc…) DMT Science monitor (burstMon, SenseMon, StochMon, PulsarMon) Generic data watchers (TimeMon, PSLmon, glitchMon,etc) Offline processing Requirements Low latency <1hr for “online” analysis ~1-2 weeks for offline analysis Ease of use – machine readable DQ segment list compilation (currently) done by hand (Keith). Automated evaluation/compilation highly desireable (S5?) LIGO-G050197 LSC Collab. Mtg, LLO, March 22,2005

LSC Collab. Mtg, LLO, March 22,2005 Data Quality Segments Detector characterization concurrent with science running. Data quality segments compiled at the end of each week of running: v00: Current science mode segment list v01: Week 1 science segments with preliminary data quality. v02: Week 1-2 science segments with preliminary data quality. v03: Week 1-3 science segments with preliminary data quality v04: Week 1-4 science segments with preliminary data quality v05-vNN: Further refined data quality flags – full run. Segment lists available from: http://gallatin.physics.lsa.umich.edu/~keithr/S4DQ/ LIGO-G050197 LSC Collab. Mtg, LLO, March 22,2005

LSC Collab. Mtg, LLO, March 22,2005 Data Quality Flags Recommended data quality flags OUTSIDE_S4 OUT_OF_LOCK INJECTION_BURST (INSPIRAL, PULSAR, STOCHASTIC) CALIB_LINE_DROPOUT ADC_OVERFLOW To be evaluated. DUST HIGH_MICROSEISM HIGH_PIXEL_FRACTION_1KHZ (2KHZ) 120HZ_UPCONVERSION TCS_SERVO LIGO-G050197 LSC Collab. Mtg, LLO, March 22,2005

Calibration Line Dropouts Calibration line injection fails occasionally Added directly to DARM_CTRL – feeds into GW channel! Line dropouts found by line tracking (Gaby et al.). Second check by notching calibration lines and looking for glitches (JGZ). Dropout classes: 1 second Single sample Others??? LIGO-G050197 LSC Collab. Mtg, LLO, March 22,2005

LSC Collab. Mtg, LLO, March 22,2005 ADC Overflows ADC Overflow counts kept by FE processors DQ flags generated from minute trends – 60s Time resolution. Channels tested AS1-4 photodiodes, I and Q POB1-2 photodiodes I and Q phases REFL1-2 photodiodes I and Q H1:LSC-AS_Q with 100Hz hi-pass filtering near AS1_Q saturation event at GPS 793728755 LIGO-G050197 LSC Collab. Mtg, LLO, March 22,2005

BurstMon Cluster Fraction Cluster fraction is a measure of noise gaussianity. Run with 1kHz & 2kHz bandwidth gaussian noise pixels distributed uniformly over t-f plane → fpixel ~0.13 Increasing cluster fraction indicates non-gaussian noise. FOMS indicate it is a good indicator of deteriorating noise. DQ flags demand fpixel > 0.5 for t>5min. Safety??? LIGO-G050197 LSC Collab. Mtg, LLO, March 22,2005

LSC Collab. Mtg, LLO, March 22,2005 120 Hz Upconversion LIGO-G050197 LSC Collab. Mtg, LLO, March 22,2005

S4 DQ Dead-Times (weeks1-3) FLAG H1 H2 L1 Injections 13279 (0.9%) 13604 (0.9%) 12822 (1.0%) Calib Line Dropouts 168 (<.1%) 360 (<.1%) 283 (<.1%) ADC Overflow 1080 (<.1%) 3840 (0.3%) 3300 (0.3%) Dust 50430 (3.4%) 38994 (3.0%) High μSeism 39315 (3.1%) Pixel Fraction (1kHz) 23880 (1.6%) 12900 (0.9%) 43800 (3.4%) Pixel Fraction (2kHz) 17640 (1.2%) 262020 (18%) 342180 (27%) 120Hz Up-Conversion 35554 (2.4%) TCS Servo 9362 (0.6%) Total Science Data 1484845 1473266 1288070* *) L1 total time adjusted for OUT_OF_LOCK, OUTSIDE_S4 segments LIGO-G050197 LSC Collab. Mtg, LLO, March 22,2005