First Year S5 Low Mass Compact Binary Coalescences

1. First Year S5Low Mass Compact BinaryCoalescences Drew Keppel1 representing the LIGO/VIRGO Compact Binary Coalescence Group 1California Institute of Technology March LSC Meeting Baton Rouge, LA 19 March 2007 LIGO-G070085-00-Z

2. Summary • Start of run (11/4/05) to anniversary of LLO joining S5 (11/14/06) • Template Banks: • 2pN inspiral templates • 2 - 35 M in total mass • Minimum single component mass of 1 M • Search pipeline (filter, vetoes, coincidence) • Playground Data Results • Expected Full Data Upper Limit • Hurdles to overcome

3. First Year S5 BNS Horizon Distance Distance to optimally oriented 1.4,1.4 M BNS at  = 8 First Year S5 (playground only) Nov 4, 2005 - Nov 14, 2006

4. First Year S5 BNS Horizon Distance Distance to optimally oriented 1.4,1.4 M BNS at  = 8 First Year S5 (playground only) Nov 4, 2005 - Nov 14, 2006

5. 16 12 8 BBH Search 4 10 20 30 Template Bank Mass 2 BNS Search Mass 1

6. Parameter Accuracyof recovered software injections • Accuracies similar to previous searches

7. Parameter Accuracyof recovered software injections • Errors in recovered accuracy dominated by higher mass region • Coincidences now done according to metric which is intrinsically mass dependent

8. Vetoes • Two types of Vetoes are used to eliminate background triggers • Data Quality Vetoes • Currently there is a preliminary list of vetoes for the first calendar year of S5 • Working with the Burst group to generate a consistent set of vetoes • Signal-Based Vetoes • 2 veto (waveform consistency test) • r2 veto (2 time above threshold) • Effective distance and consistency cut • Initial tuning for first calendar year very similar to tuning done for S5 Epoch 1 BNS and BBH searches • We were doing something right!

9. Accidental Coincidencesand Simulated Signals • Initial tuning of pipeline on playground triggers, time slides and injections • All triggers from playground times only • Measure background by applying time slides before coincidence • Add simulated signals to detector data to evaluate analysis performance

10. Software Injections

11. S5 1 Year Playground DataBackground and Foreground Higher Mass Region Mchirp > 8.0 Lower Mass Region Mchirp < 2.0

12. Mass DependentUpper Limit • Sorting triggers by mass to give different backgrounds and foregrounds for different mass regions • Allows different loudest events and injection recovery efficiencies for different mass regions • Helps to prevent spurious glitches, which affect the higher mass portion of parameter space, from influencing the upper limit we can place on lower mass portion of the parameter space • Background may also be dependent on epoch • Looking into correct way to combine different epochs

13. Projected Upper Limitfor Non-playground Data • Expected Non-playground Time: • H1H2L1: 132.6 days • H1H2: 75.8 days • H1L1: 12.4 days • H2L1: 15.5 days • Projected Upper Limit Ng Rate S4 Result • Total Mass = 3 M: 222 L10 2.1x10-2 L10-1yr-11.2 L10-1yr-1 • Total Mass = 6 M: 643 L10 7.6x10-2 L10-1yr-1 2.3x10-1 L10-1yr-1 • Total Mass = 10 M: 2020 L10 2.1x10-3 L10-1yr-14.5x10-1 L10-1yr-1

14. Future Issues forS5 1 Yr Low Mass CBC Search • Deal with memory management issues arising with combining a year’s worth of triggers • RAM • Disk space • Finalize tuning, open the box and follow up • Goal is a result presented at July LSC Meeting 2007

15. The End