1 detector characterization for burst searches by resonant detectors f. salemi italy, infn and...

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Detector characterization for burst searches by

resonant detectors

F. Salemi Italy, INFN and University of Ferrara

for the IGEC2 Collaboration

The 10th Gravitational Wave Data Analysis Workshop (GWDAW-10)December 14th to 17th, 2005 Brownsville, Texas.

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Outline

• AURIGA Spectrum Vetoes Event Search MonteCarlo Software Injections

• Raw Data exchange: First step toward the Cross-validation of analyses Results produced by AURIGA Data Analysis

IGEC2 Shh

Event Search MonteCarlo: Time of arrival uncertainties

estimation Hardware Injections

GWDAW10 - December 14th, 2005 - Brownsville, Texas

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700 800 900 1000 1100-14

-13

-12

-11

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Residual spurious lines

HV plate modes

Spuriousmodes(unidentified)

Main modes

Lo

g P

ow

er S

pec

tral

Den

sity

(V

2 /Hz)

Frequency (Hz)

AURIGA output: the modes

Typical recent spectrum averaged on 8 consecutive hours

Main modes = mixing of bar, transducer and electrical modes:

865, 914, 955 Hz

at thermal noise level

0 500 1000 1500-14

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-10

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Power lines

Low frequency suspensions

Lo

g P

ow

er S

pec

tral

Den

sity

(V

2 /Hz)

Frequency (Hz)


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Vetoes (1)


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Vetoes

600 700 800 900 1000 1100 1200

[ Hz ]

Anticoincidence vetoes X

Epoch vetoes X

Vetoing System

Anticoincidence veto: “WideBands” veto

Epoch Veto: “F7” veto


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Candidate Events: run687 (July 2005)

[ days ]

SN

R

SNR

TObs N Events Rate[Hz]

271.3 hr (11.3 days) 64010 66 mHz

“Wide band” veto 11829 12 mHz

(2087 s vetoed out)

“F7” veto 11765 12 mHz

(896 s vetoed out)


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• Measurement of detection efficiency by injections of software signals in real data

• crucial to cross-validate detectors in a network

• Submillisecond arrival time resolution

• crucial to check travel speed of the gw and to locate the source

arrival time estimation for signals

Detection efficiencyFor signals

MonteCarlo results


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IGEC2 Raw Data ExchangeAll Credits to Gabriele Vedovato

ALLEGRO• Lockin with reference frequency @ 904 Hz• Quadrature & Phase components sampled @ 250 Hz• 2 Binary files (1 day size)• A day of data-taking: AL05262.raw (19 September, 2005)• A day with Hardware Injections: AL05202.raw (22 July, 2005)

NAUTILUS and EXPLORER• Binary files: raw data sampled @ 5 kHz• A day of data-taking for both detectors: 11 December, 2004

AURIGA analizing raw data from other bar detectors.The Followed Procedure:• (Upconversion to the original frequency, for ALLEGRO Data only)• Conversion to FRAME Format• Ad-hoc Calibration to comply with validated Shh curves• Analysis with AURIGA Data Analysis (ADA)

Scope• Cross-validation• Comparison of different algorithms and pipelines


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IGEC2 Shh (obtained by ADA)

ALLEGRO: September 2005

AURIGA : July 2005

EXPLORER: December 2004

NAUTILUS: December 2004

Sigma[1/Hz 1e22]

FWHM [Hz]

ALLEGRO 2.0 4.5

AURIGA 1.4 26

EXPLORER 2.9 3.4

NAUTILUS 2.4 3.6


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Event Search on all the bars

ETG:

δ-matched filter

TH: SNR>4.0

N Evt=3146

N Evt=4650

N Evt=1698

N Evt=2859


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Sofware Injections: Time errors

ALLEGRO: September 2005

AURIGA : July 2005

EXPLORER: December 2004

NAUTILUS: December 2004

SNR

Ter

r [

s ]


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Time-Frequency : hw injected events at 0.02 Hz

ALLEGRO Hardware Injections (22 July 2005)

Spectrum : noise [red] – signal [yellow]840 860 880 900 920 940 960


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Hardware Injections (2)

hw injected : phase error time distributionTphs = 1/(* snr) = 1 / (6.28 * 910 * 31.12)

hw injected : error time distribution (time differences out-in times)hw injected : snr distribution


Extra slides

Hardware InjectionsAL05202.raw (22 July 2005)

The "837 oscillator" is set for brst count = 1freq = 899 Hzampl = 0.100 Vpp @ displaytrig src = ratetrig rate = 0.02 Hz

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Time of arrival error estimate (Monte Carlo)

1 detector characterization for burst searches by resonant detectors f. salemi italy, infn and...

Documents

texas slide

hz slide

allegro data

day of data

hz allegro hardware

f7 veto gwdaw10

pipelines gwdaw10

snr distribution gwdaw10