1 / 16

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)

chen
Télécharger la présentation

Overview of LIGO Scientific Collaboration Inspiral Searches

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related