G050249 00

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Information about G050249 00

Published on November 28, 2007

Author: Nikita

Source: authorstream.com

Search for inspiraling black holes with the LIGO gravitational wave detectors:  Search for inspiraling black holes with the LIGO gravitational wave detectors Alexander Dietz Louisiana State University Inspiral Working Group, LIGO Scientific Collaboration Outline:  Outline Analysis Pipeline Injections & Templates Background Estimate LIGO Observatories:  LIGO Observatories Hanford: two interferometers in same vacuum envelope (4km, 2km) Livingston: one interferometer (4km) Inspiral and Merger of Compact Binaries:  Inspiral and Merger of Compact Binaries Neutron Star Component Masses of 1 to 3 MSUN fISCO= 800 Hz Use post-Newtonian waveform Black Holes Component Masses of >3MSUN fISCO= 110 Hz Use template (BCV) Buoanno, Chen, Vallisneri, PRD 67, 2003 Analysis Pipeline (S2):  Analysis Pipeline (S2) Vetoes/cuts L1 Vetoes/cuts Vetoes/cuts Event candidates Injections:  Injections Software injections validate and tune the pipeline quantify the sensitivity of the instruments test how well the BCV templates can be used for recovering different waveforms and parameters (PPN, Pade, EOB) “Population” Uniform in each component mass: 3 – 20 MSUN Uniform in log10(distance): 1 kpc – 20 Mpc Inspiral range :  Inspiral range Inspiral range during S2: Up to 6 Mpc for L1 Neutron Star: about 3Mpc L1 H1 H2 Background vs Injections:  Background vs Injections Very clear distinction between: Background triggers Found injections Background estimate:  Background estimate Using combined statistic: Conclusion:  Conclusion Using ‘BCV’ templates to search for coalescences of binary black holes Software injections done to tune pipeline, calculate efficiencies and test parameter recovery Time slides are used for background estimations Final results will be published soon

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