Status of the LIGO-TAMA Joint Data Analyses

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Presentation transcript:

Status of the LIGO-TAMA Joint Data Analyses Patrick Sutton LIGO Laboratory, Caltech, for the LIGO-TAMA Joint Working Group

Joint Working Group Masaki Ando, Patrick Brady, Laura Cadonati, Alessandra Di Credico, Steve Fairhurst, Sam Finn, Nobuyuki Kanda, Erik Katsavounidis, Sergey Klimenko, Albert Lazzarini, Saikat Ray Majumder, John McNabb, Peter Saulson, Amber Stuver, Patrick Sutton, Julien Sylvestre, Hideyuki Tagoshi, Ryutaro Takahashi, Daisuke Tatsumi, Stan Whitcomb. Sutton Bursts Mtg 2004/03/14

LIGO-TAMA Joint Analyses GRB-triggered search for unmodelled bursts (Marka) Inspirals (Fairhurst) Untriggered search for unmodelled bursts (Sutton) Sutton Bursts Mtg 2004/03/14

Untriggered Bursts Analysis The bursts analysis for high-frequency LIGO data is done in coincidence with TAMA. Unmodelled GWBs: duration ~< 1s frequency 700-2000Hz. Goals: Upper limit on number of detected GWBs. Upper limit on rate-vs-strength for selected signal and population models. Sutton Bursts Mtg 2004/03/14

Sample S2/DT8 Spectra LIGO and TAMA look with best sensitivity at different frequencies: Tune for signals near minimum of envelope, [700-2000]Hz. Sutton Bursts Mtg 2004/03/14

Different Antenna Patterns LLO TAMA Increase h50% in zenith  all sky averaging: x8 for LIGO-TAMA x3 for LIGO only. Polarization-dependent response: restrict r-statistic test to LIGO. (This plot: Equal power in uncorrelated polarizations) Sutton Bursts Mtg 2004/03/14

Analysis Procedure Single-IFO Event Generation separately for each IFO: BlockNormal, Power, TFClusters, WaveBurst for LIGO, Power for TAMA Tuning: maximize efficiencies while keeping < 1 background event for S2. Coincidence & Coherence: Temporal coincidence in all 4 IFOs r-statistic among LIGO triggers to reduce false rate Efficiencies: Measure using coordinated signal injections: Gaussians, sine-Gaussians, damped sinusoids, Lazarus black-hole mergers (?). Upper Limits: As for low-frequency search (number of detected events, rate versus strength). Sutton Bursts Mtg 2004/03/14

Sample Tuning: TFClusters IFO Rate (Hz) TAMA 0.93 H1 0.10 H2 0.014 L1 0.80 Guesstimates: R4X ~ 10-7Hz (before r-statistic) hrss4X ~ 2.6x10-19Hz-1/2 (all sky, 2000Hz SG) 3.4x10-20 Hz-1/2 Sutton Bursts Mtg 2004/03/14

Analysis Status Single-IFO Event Generation: Efficiencies: WaveBurst done TFClusters & TAMA Power underway: tuning in hand; ready to make choice for production of triggers. Power, BlockNormal: tuning underway. Efficiencies: Zenith injections done. (Simulation data being exchanged.) Coordinated signal injections in preparation. 4 x Coincidence & Coherence: Coincidence window determination underway. r-statistic tuning (for LIGO) underway. Schedule: Finish for June Meeting Sutton Bursts Mtg 2004/03/14