1. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z1 Overview of LIGO Scientific Collaboration Inspiral Searches Alexander Dietz Louisiana State University for the LIGO Scientific Collaboration LIGO-G050632-00-Z

2. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z2 Outline 1.Introduction, Overview 2.Details: I.Primordial black hole binaries (PBHB) II.Binary Neutron Stars (BNS) III.Binary Black Holes (BBH) IV.Other searches 3.Outlook & Summary

3. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z3 Our searches BNS PBH Spin is important “High mass ratio” Coming soon 1 3 10 0.1 Mass 0.11 3 10 Inspiral-Burst S4 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 BBH

4. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z4 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)

5. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z5 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 Basic search parameters (S3) Search Low frequency cutoff Length in LIGO band Number of templates PBHB100 Hz7 s (0.7)3000 BNS70 Hz6 s (1.4)1000 BBH70 Hz0.3 s (5.0)1200

6. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z6 The pipeline 2 nd Coincidence The interferometers Signal based veto Coherent analysis Follow up Bank of templates Matched filtering See talk by Patrick Brady Not for BBH

7. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z7 Injections Example of a hardware injection Two different types of injections performed 1.Software injections  Determine the efficiency  Test the pipeline 2.Hardware injections  Validate software injections  Check vetoes for safety

8. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z8 Primordial black hole binaries  Hypothetical subsolar mass objects that contribute to the Dark Matter in galaxies Component mass0.35 - 1 Duration in LIGO band7 s (0.7) Number of templates3000 Low freq. cutoff100 Hz

9. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z9 Binary Neutron Stars  Solar mass stellar remnants Component mass1 - 3 Duration in LIGO band6 s (1.4) Number of templates1000 Low freq. cutoff70 Hz

10. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z10 Binary Neutron Stars Effective distance after the coincidence step limited by the second best instrument

11. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z11 Simulation of galaxy distribution See poster by Ravi Kumar

12. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z12 Binary Black Holes Uses phenomenological templates (BCV) for matched filtering Software injections: model based waveforms: –Taylor, Pade, EOB χ 2 test not yet available Buoanno, Chen, Vallisneri, PRD 67, 2003  Use of phenomenological parameters

13. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z13 Binary black holes  Stellar remnants Component mass3 - 40 Duration in LIGO band0.3 s (5) Number of templates1200 Low freq. cutoff70 Hz

14. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z14 Binary Black Holes Effective distance of L1 improved from 8 Mpc to 40 Mpc

15. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z15 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

16. 15 Dec 2005GWDAW 10 LIGO-G050632-00-Z16 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…