S2 Inspiral Hardware Injections

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Presentation transcript:

S2 Inspiral Hardware Injections Duncan Brown University of Wisconsin-Milwaukee LIGO Scientific Collaboration Inspiral Working Group LIGO-G030595-00-Z

LIGO Scientific Collaboration - IUL Group - LIGO-G030135-00-Z Improvements for S2 More comprehensive set of injections (Brady, Chickarmane, T Creighton) Larger range of masses and distances: - 15 to 500 kpc - (1.0,1.0), (1.4,1.4), (10.0,1.0), (10.0,20.0) Regular injections as well as extended injection run (Marka, Leonor, Shawhan) Record excitation channel to know injected signal Spaced injections further apart to avoid corruption of PSD 3/19/2003 LIGO Scientific Collaboration - IUL Group - LIGO-G030135-00-Z

Use of Injections in S1 Analysis The S1 injections were used in the validation and verification of the pipeline Detected a timing discrepancy between hardware and software injections Prompted a very thorough analysis of the whole pipeline to determine source of discrepancy Used S2 hardware injections, since had EXC channel recorded Traced the discrepancy different uses of the template generation code 3/19/2003 LIGO Scientific Collaboration - IUL Group - LIGO-G030135-00-Z

Use of Injections in S1 Analysis Confirms that the software injections are good! 3/19/2003 LIGO Scientific Collaboration - IUL Group - LIGO-G030135-00-Z

S2 Hardware Injection Plan Analyze a small amount of the S2 injection data from all IFOs as an initial check. Keep others blind. Provide feedback to calibration team from initial data Study correlation between possible veto channels Develop inspiral pipeline based on data quality cuts, triggers in playground data, vetoes, etc. Use S2 hardware injections as a final check on the pipeline 3/19/2003 LIGO Scientific Collaboration - IUL Group - LIGO-G030135-00-Z

Preliminary Results (Christensten) Veto and Detector Characterization Studies: Looked at H1 and L1 in injected signals as a means of helping to verify the safety of certain vetoes. The most important effect so far had been to cast doubt on the safety of use of ITM_OPLEV signals as vetoes. We are looking at these injected events as part of glitch/correlation/bicoherence studies. 3/19/2003 LIGO Scientific Collaboration - IUL Group - LIGO-G030135-00-Z

Preliminary Results with Online Calibration 3/19/2003 LIGO Scientific Collaboration - IUL Group - LIGO-G030135-00-Z