1 / 7

Plans for S2 inspiral analyses

Plans for S2 inspiral analyses. LSC Inspiral Analysis Group June 27. 2003 Circulation restricted to LIGO-I members. IUL Group S2 Science Goal #1. Binary Neutron Star Search

Download Presentation

Plans for S2 inspiral analyses

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. Plans for S2 inspiral analyses LSC Inspiral Analysis Group June 27. 2003 Circulation restricted to LIGO-I members

  2. IUL Group S2 Science Goal #1 • Binary Neutron Star Search • upper limit on the rate of binary neutron star inspirals in the universe with target population to include Andromeda unless we see something • Anticipated results • Assume weak detection from Andromeda • Efficiency ~ 0.2 and T~800 • R~25 /yr /MWEG • (S1: 170 /yt/MWEG) LIGO Scientific Collaboration - IUL Group

  3. IUL Group S2 Science Goal #1 • Improvements over S1 analysis • Data Quality cuts up front • H1-H2, H1-L1, H2-L1 & H1-H2-L1 coincidence • Improved veto studies (safety tests helped by many hardware injections) • New features • New chi-squared tests • Improved PSD estimators (use median and better averaging) • Use hierarchical pipeline: • Trigger in L1 at S/N = rL1 • This corresponds to a S/N in H1 of rH1 • And a S/N in H2 of rH2 • rH1 = (sigmaH1/sigmaL1)*rL1 ~ 0.45*rL1 (using SenseMon ranges) • Depending on threshold cuts for each IFO we will have double or triple coincidence  coherent analysis LIGO Scientific Collaboration - IUL Group

  4. IUL Group S2 Science Goal #2 • Non-spinning binary black hole (BBH) search • Undecided what the scientific paper at the end will be: null result or rate upper limit. • Anticipated max. distance to optimally oriented binary is up to 7Mpc at ~20 Msun assuming standard post-Newtonian waveforms • New aspects of this search • Uncertainty in waveforms mean looser chi-squared cuts • Use detection template family • must Monte-Carlo efficiency to all known model waveforms (costly) • Instrumental vetoes and coincidence far more important • Will add coincidence with a burst and ringdown search after end of inspiral search • Anticipated results: • First search (event candidate, if we got extremely lucky) for BBH inspiral LIGO Scientific Collaboration - IUL Group

  5. Binary Black Hole Range Effective One Body Standard post-Newt LIGO Scientific Collaboration - IUL Group

  6. IUL Group S2 Science Goal #3 • Search for low-mass BBH mergers in Halo • i.e. MACHO binary search • Search will follow binary neutron star pipeline • Only new aspect of search will be population model • Large uncertainties in mass distributions • Probably insensitive to spatial distribution • Anticipated results: • High efficiency, T~800 hrs  R ~ few a year LIGO Scientific Collaboration - IUL Group

  7. Template Bank Search: Report by July 1. (Duncan, Patrick B.) Data Quality: Use what's available on July 1. (Peter S. and Gaby) Veto Studies: First report by July 1. Tabulate, but also worry about how to integrate this information automatically into pipeline (Yunyong, Weili, Brian, Nelson, Natalia). Template Search Validation: Report July 15th (Stas+) Coherent Code: Report July 15th (_____) Beta Pipeline: Report July 15th. (Patrick) Time of Arrival template Chisq: Report July 15th. (Valera) Spin Statistics for BH-X binaries: Report July 15th (Philippe,Vicky) Report on Burst/Inspiral trigger coincidence, July 22nd (Saikat,Warren) Face to Face: LLO July 25th. Review initial pipeline output. (All) Task list and schedule LIGO Scientific Collaboration - IUL Group

More Related