LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G040133-00-E Summary of E10 / S3 Hardware Signal Injections Peter Shawhan, Szabolcs Márka, Bruce.

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Presentation transcript:

LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G E Summary of E10 / S3 Hardware Signal Injections Peter Shawhan, Szabolcs Márka, Bruce Allen, Sukanta Bose, Stephen Fairhurst, Michael Landry, Alan Weinstein Additional software written by Daniel Sigg and Isabel Leonor LSC Meeting March 17, 2004 LIGO-G E

LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G E The Big Picture S E10 Pulsar Stochastic Burst 3330H1 2642H2 314L1 Inspiral 188H1 120H2 12L · · 404 · · 402 · · 170 · · · · · · 144 · · · · · · · · · · 23 · 28 · 25 · 44 · · · · · · · · · · · · 12 GPS

LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G E General Details Pulsar and stochastic injections are in science-mode data Burst and inspiral injections are not All signals were injected into ETMX_EXC Calibration lines continued on DARM_CTRL_EXC during all injections Injections synchronized between sites using GPS timing

LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G E Pulsar Injection Details Simulated pulsar waveforms calculated on-the-fly Software provided by Bruce Allen Up to 10 simultaneous simulated pulsars Wide range of sky positions, frequencies, spin-down rates, and amplitudes Injection parameters accounted for actuation transfer functions Late in run, one pulsar injected in coordination with GEO Largest-amplitude pulsars discontinued partway through run All pulsar injections turned off for middle part of run

LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G E Pulsar Injection Monitoring

LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G E Stochastic Injection Details Correlated noise calculated on-the-fly Software provided by Sukanta Bose and Bruce Allen Injected over a period of several hours during S3 run Normalized to correspond to Ω GW = 1 Science data: 1.9 hours for H1, 4.6 hours for H2, 3.7 hours for L1

LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G E Burst Injection Details Various pre-computed waveforms Waveform files provided by Alan Weinstein Sine-Gaussian with various frequencies and Qs, Zwerger-Müller and Dimmelmeier-Font-Müller, and a few Gaussians Injected with various amplitudes Did not account for actuation transfer functions (makes little difference for Sine-Gaussians)

LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G E Inspiral Injection Details Used a few sets of waveform files S2 waveform files used at first New files for S3 provided by Steve Fairhurst Masses: 1.4  1.4, 1.0  1.0, 10  10, 10  1 M ⊙ Tricky to account for actuation transfer function Unable to exactly compensate for the notch filter at the violin mode freq Switched to using “notchless” transfer function to avoid big transient Tried a few ways to avoid a big kick at coalescence time Rolled off waveform amplitude at end

LSC Meeting, 17 March 2004 Shawhan, Marka, et al.LIGO-G E Summary Pulsar and stochastic injections were highly successful “Astrophysical” as well as simple burst waveforms Improved understanding of inspiral waveform issues Few burst / inspiral injections into L1 Further details (lists, etc.) on Hardware Injection web page: We need to decide what do to for S4 well before it begins