1. 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 14 th to 17 th, 2005 Brownsville, Texas.

2. 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 S hh Event Search MonteCarlo: Time of arrival uncertainties estimation Hardware Injections GWDAW10 - December 14 th, 2005 - Brownsville, Texas

3. 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 14 th, 2005 - Brownsville, Texas

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

5. 5 Vetoes 600 700 800 900 1000 1100 1200 [ Hz ] Anticoincidence vetoes X Epoch vetoes X Vetoing System Anticoincidence veto: “WideBands” veto Epoch Veto: “F7” veto GWDAW10 - December 14 th, 2005 - Brownsville, Texas

6. 6 Candidate Events: run687 (July 2005) [ days ] SNR TObsN EventsRate[Hz] 271.3 hr (11.3 days) 6401066 mHz “Wide band” veto 11829 12 mHz (2087 s vetoed out) “F7” veto 11765 12 mHz (896 s vetoed out) GWDAW10 - December 14 th, 2005 - Brownsville, Texas

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

8. 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 S hh curves Analysis with AURIGA Data Analysis (ADA) Scope Cross-validation Comparison of different algorithms and pipelines GWDAW10 - December 14 th, 2005 - Brownsville, Texas

9. 9 IGEC2 S hh (obtained by ADA) ALLEGRO: September 2005 AURIGA : July 2005 EXPLORER: December 2004 NAUTILUS: December 2004 Sigma [1/Hz 1e22] FWHM [Hz] ALLEGRO2.04.5 AURIGA1.426 EXPLORER2.93.4 NAUTILUS2.43.6 GWDAW10 - December 14 th, 2005 - Brownsville, Texas

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

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

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

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

14. Extra slides

15. Hardware Injections AL05202.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. 16 Time of arrival error estimate (Monte Carlo)