LIGO-G060555-00-Z Peter Shawhan, for the LSC Burst Analysis Group LSC Observational Results Meeting November 4, 2006 The S4 LIGO All-Sky Burst Search.

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Presentation transcript:

LIGO-G Z Peter Shawhan, for the LSC Burst Analysis Group LSC Observational Results Meeting November 4, 2006 The S4 LIGO All-Sky Burst Search

LSC Meeting, 4 Nov 2006 LIGO-G Z 2 Overview of the Search ► Searched triple-coincidence LIGO S4 data for short (<1 sec) signals of arbitrary form with frequency content in range Hz ► Used WaveBurst to generate triggers, followed by CorrPower cross-correlation tests based on r-statistic ► Data quality cuts, significance cuts and veto conditions chosen largely based on time-shifted coincidences ► Box opened; no events found; set an upper limit on rate ► Sensitivity evaluated for ad-hoc signals using MDC technique ► Technical details document:

LSC Meeting, 4 Nov 2006 LIGO-G Z 3 The Paper Intended journal: Classical and Quantum Gravity Medium length— enough to stand alone, but without details of methods Previous draft circulated in June; now have a Final Draft Addressed comments, added material, cleaned up text and figures We would appreciate comments on this draft in the next week or two …

LSC Meeting, 4 Nov 2006 LIGO-G Z 4 Analysis Cuts and Vetoes All triggers After data quality cuts After H1-H2 consistency cuts After auxiliary- channel vetoes WaveBurst CorrPower

LSC Meeting, 4 Nov 2006 LIGO-G Z 5 The Search Result Frequentist one-sided upper limit (90% C.L.) taking background to be zero (conservative) R 90% = = 0.15 per day 15.5 days 2.303

LSC Meeting, 4 Nov 2006 LIGO-G Z 6 Efficiencies for Simulated Signals Fit to function: Also: Sine-Gaussians with Q = 3, 100 Gaussians Band-limited white noise

LSC Meeting, 4 Nov 2006 LIGO-G Z 7 Sensitivity Summaries

LSC Meeting, 4 Nov 2006 LIGO-G Z 8 Exclusion Diagrams

LSC Meeting, 4 Nov 2006 LIGO-G Z 9 Mass Equivalence For sine-Gaussian, 153 Hz, Q=8.9, h rss at 50% efficiency is 1.3 x 10 –21 Hz –1/2 Corresponds roughly to: 8 x 10 –8 M  emitted at 10 kpc or 0.2 M  emitted at Virgo Cluster (16 Mpc)