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Detector characterization for burst searches by resonant detectors

Detector characterization for burst searches by resonant detectors. F. Salemi Italy, INFN and University of Ferrara for the IGEC2 Collaboration The 10th Gravitational Wave Data Analysis Workshop (GWDAW-10) December 14 th to 17 th , 2005 Brownsville, Texas. Outline. AURIGA Spectrum

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Detector characterization for burst searches by resonant detectors

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  1. Detector characterization for burst searches by resonant detectors F. Salemi Italy, INFN and University of Ferrara for the IGEC2 Collaboration The 10th Gravitational Wave Data Analysis Workshop (GWDAW-10) December 14th to 17th, 2005 Brownsville, Texas.

  2. Outline • AURIGA • Spectrum • Vetoes • Event Search • MonteCarlo Software Injections • Raw Data exchange: • First step toward the Cross-validation of analyses • Results produced by AURIGA Data Analysis • IGEC2 Shh • Event Search • MonteCarlo: Time of arrival uncertainties estimation • Hardware Injections GWDAW10 - December 14th, 2005 - Brownsville, Texas

  3. AURIGA output: the modes Typical recent spectrum averaged on 8 consecutive hours Main modes = mixing of bar, transducer and electrical modes: 865, 914, 955 Hz at thermal noise level GWDAW10 - December 14th, 2005 - Brownsville, Texas

  4. Vetoes (1) GWDAW10 - December 14th, 2005 - Brownsville, Texas

  5. Vetoes Epoch vetoes X Vetoing System Anticoincidence vetoes X Anticoincidence veto: “WideBands” veto Epoch Veto: “F7” veto • 700 800 900 1000 1100 1200 • [ Hz ] GWDAW10 - December 14th, 2005 - Brownsville, Texas

  6. Candidate Events: run687 (July 2005) SNR [ days ] SNR TObs N Events Rate[Hz] 271.3 hr (11.3 days) 64010 66 mHz “Wide band” veto 11829 12 mHz (2087 s vetoed out) “F7” veto 11765 12 mHz (896 s vetoed out) GWDAW10 - December 14th, 2005 - Brownsville, Texas

  7. MonteCarlo results • Measurement of detection efficiency by injections of software signals in real data • crucial to cross-validate detectors in a network Detection efficiency For  signals arrival time estimation for  signals • Submillisecond arrival time resolution • crucial to check travel speed of the gw and to locate the source GWDAW10 - December 14th, 2005 - Brownsville, Texas

  8. IGEC2 Raw Data Exchange All Credits to Gabriele Vedovato ALLEGRO • Lockin with reference frequency @ 904 Hz • Quadrature & Phase components sampled @ 250 Hz • 2 Binary files (1 day size) • A day of data-taking: AL05262.raw (19 September, 2005) • A day with Hardware Injections: AL05202.raw (22 July, 2005) NAUTILUS and EXPLORER • Binary files: raw data sampled @ 5 kHz • A day of data-taking for both detectors: 11 December, 2004 AURIGA analizing raw data from other bar detectors. The Followed Procedure: • (Upconversion to the original frequency, for ALLEGRO Data only) • Conversion to FRAME Format • Ad-hoc Calibration to comply with validated Shh curves • Analysis with AURIGA Data Analysis (ADA) Scope • Cross-validation • Comparison of different algorithms and pipelines GWDAW10 - December 14th, 2005 - Brownsville, Texas

  9. IGEC2 Shh (obtained by ADA) ALLEGRO: September 2005 AURIGA :July 2005 EXPLORER: December 2004 NAUTILUS: December 2004 GWDAW10 - December 14th, 2005 - Brownsville, Texas

  10. Event Search on all the bars N Evt=3146 N Evt=2859 ETG: δ-matched filter TH: SNR>4.0 N Evt=4650 N Evt=1698 GWDAW10 - December 14th, 2005 - Brownsville, Texas

  11. Sofware Injections: Time errors ALLEGRO: September 2005 AURIGA :July 2005 EXPLORER: December 2004 NAUTILUS: December 2004 Terr [ s ] SNR GWDAW10 - December 14th, 2005 - Brownsville, Texas

  12. ALLEGRO Hardware Injections(22 July 2005) Time-Frequency : hw injected events at 0.02 Hz 840 860 880 900 920 940 960 Spectrum : noise [red] – signal [yellow] GWDAW10 - December 14th, 2005 - Brownsville, Texas

  13. Hardware Injections (2) hw injected : error time distribution (time differences out-in times) hw injected : snr distribution hw injected : phase error time distribution Tphs = 1/(w* snr) = 1 / (6.28 * 910 * 31.12) GWDAW10 - December 14th, 2005 - Brownsville, Texas

  14. Extra slides

  15. Hardware InjectionsAL05202.raw (22 July 2005) The "837 oscillator" is set for brst count = 1 freq = 899 Hz ampl = 0.100 Vpp @ display trig src = rate trig rate = 0.02 Hz

  16. Time of arrival error estimate (Monte Carlo)

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