LSC Meeting, 17 March 2004 Shawhan, Marka, et al. LIGO-G040133-00-E

Summary of E10 / S3Hardware 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 MeetingMarch 17, 2004

LIGO-G040133-00-E

LSC Meeting, 17 March 2004 Shawhan, Marka, et al. LIGO-G040133-00-E

The Big Picture

S3

10 10 9 7

751000000

752000000

753000000

754000000

755000000

756000000

757000000

758000000

750000000

E10

PulsarStochastic

Burst3330 H12642 H2

314 L1

Inspiral188 H1120 H2

12 L1

86 1168 288 51 322 198 264 141 308 102 402 · 76 1055 288 · 404 · 162 20 235 · 402 · · 170 · · · · · · 144 · · ·

· · · 13 15 17 28 14 27 10 48 16 · · · · 23 · 28 · 25 · 44 · · · · · · · · · · · · 12

GPS

LSC Meeting, 17 March 2004 Shawhan, Marka, et al. LIGO-G040133-00-E

General Details

Pulsar and stochastic injections are in science-mode dataBurst and inspiral injections are not

All signals were injected into ETMX_EXCCalibration 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-G040133-00-E

Pulsar Injection Details

Simulated pulsar waveforms calculated on-the-flySoftware 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 partwaythrough run

All pulsar injections turned off for middle part of run

LSC Meeting, 17 March 2004 Shawhan, Marka, et al. LIGO-G040133-00-E

Pulsar Injection Monitoring

LSC Meeting, 17 March 2004 Shawhan, Marka, et al. LIGO-G040133-00-E

Stochastic Injection Details

Correlated noise calculated on-the-flySoftware provided by Sukanta Bose and Bruce Allen

Injected over a period of several hours during S3 run

Normalized to correspond to ΩGW = 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-G040133-00-E

Burst Injection Details

Various pre-computed waveformsWaveform 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 actuationtransfer functions (makes littledifference for Sine-Gaussians)

LSC Meeting, 17 March 2004 Shawhan, Marka, et al. LIGO-G040133-00-E

Inspiral Injection Details

Used a few sets of waveform filesS2 waveform files used at first

New files for S3 provided by Steve Fairhurst

Masses: 1.41.4, 1.01.0, 1010, 101 M⊙

Tricky to account for actuation transfer functionUnable to exactly compensate for the notch filter at the violin mode freq

Switched to using“notchless” transferfunction to avoidbig transient

Tried a few ways to avoid a big kick at coalescence timeRolled off waveform amplitude at end

LSC Meeting, 17 March 2004 Shawhan, Marka, et al. LIGO-G040133-00-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:http://blue.ligo-wa.caltech.edu/scirun/S3/HardwareInjection/

We need to decide what do to for S4 well before it begins