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Overview of LIGO Scientific Collaboration Inspiral Searches

Alexander Dietz Louisiana State University for the LIGO Scientific Collaboration. Overview of LIGO Scientific Collaboration Inspiral Searches. LIGO-G050632-00-Z. Outline. Introduction, Overview Details: Primordial black hole binaries (PBHB) Binary Neutron Stars (BNS)

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Overview of LIGO Scientific Collaboration Inspiral Searches

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  1. Alexander Dietz Louisiana State University for the LIGO Scientific Collaboration Overview of LIGO Scientific Collaboration Inspiral Searches GWDAW 10 LIGO-G050632-00-Z LIGO-G050632-00-Z

  2. Outline • Introduction, Overview • Details: • Primordial black hole binaries (PBHB) • Binary Neutron Stars (BNS) • Binary Black Holes (BBH) • Other searches • Outlook & Summary GWDAW 10 LIGO-G050632-00-Z

  3. Our searches • Several inspiral searches are performed currently: • Primordial black holes binaries (PBHB) • Binary Neutron Stars (BNS) • Binary Black Holes (BBH) • Other searches in progress • Spinning Black Holes • Coincidences with GRB • Black Hole Ringdown • Inspiral-Burst Mass BBH 10 Inspiral-Burst S4 3 Spin is important BNS 1 “High mass ratio” Coming soon PBH 0.1 GWDAW 10 LIGO-G050632-00-Z 0.1 1 10 3 Mass

  4. The Science Runs • Data from the latest science runs being analyzed: • Science Run 3 (S3): 31 Oct ‘03 to 09 Jan ‘04 • Science Run 4 (S4): 22 Feb ‘05 to 24 Mar ‘05 • GEO data included (for BNS only currently) GWDAW 10 LIGO-G050632-00-Z

  5. Similarities and Differences • Similarities of PBHB, BNS and BBH: • Same pipeline • Same code • Same matched filter techniques • Same data segments • Differences: • Different templates • Different vetoes • Tuning done independent • Different detection statistics GWDAW 10 LIGO-G050632-00-Z

  6. Thepipeline The interferometers Bank of templates Matched filtering See talk by Patrick Brady Signal based veto Not for BBH 2nd Coincidence Coherent analysis Follow up GWDAW 10 LIGO-G050632-00-Z

  7. Injections • Two different types of injections performed • Software injections • Determine the efficiency • Test the pipeline • Hardware injections • Validate software injections • Check vetoes for safety Example of a hardware injection GWDAW 10 LIGO-G050632-00-Z

  8. Primordial black hole binaries • Hypothetical subsolar mass objects that contribute to the Dark Matter in galaxies GWDAW 10 LIGO-G050632-00-Z

  9. Binary Neutron Stars • Solar mass stellar remnants GWDAW 10 LIGO-G050632-00-Z

  10. Binary Neutron Stars Effective distance after the coincidence step limited by the second best instrument GWDAW 10 LIGO-G050632-00-Z

  11. Simulation of galaxy distribution See poster by Ravi Kumar GWDAW 10 LIGO-G050632-00-Z

  12. Binary Black Holes • Uses phenomenological templates (BCV) for matched filtering Buoanno, Chen, Vallisneri, PRD 67, 2003 • Use of phenomenological parameters • Software injections: model based waveforms: • Taylor, Pade, EOB • χ2 test not yet available GWDAW 10 LIGO-G050632-00-Z

  13. Binary black holes • Stellar remnants GWDAW 10 LIGO-G050632-00-Z

  14. Binary Black Holes Effective distance of L1 improved from 8 Mpc to 40 Mpc GWDAW 10 LIGO-G050632-00-Z

  15. Other searches • Spinning black holes • 17 Parameters • Computation intensive • Coincidences with GRB • Short GRB possible from BNS • Location known, optimal oriented • Black Hole Ringdown search • Inspiral-burst search • Online search during S5: • BNS and BBH See poster by Gareth Jones See poster by Alexander Dietz See poster by Lisa Goggin See talk by Saikat Majumder GWDAW 10 LIGO-G050632-00-Z

  16. Summary & Outlook • Multiple searches underway • Searching a wide parameter space • Injections performed to test the pipeline and determine the efficiency • Parameter tuning in progress • Future: • Search extreme mass ratio inspirals • Hierarchical Network analysis More details on those searches: stay tuned… GWDAW 10 LIGO-G050632-00-Z

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