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Transcript of 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
-10
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-8
-7
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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
-12
-10
-8
-6
-4
Power lines
Low frequency suspensions
Lo
g P
ow
er S
pec
tral
Den
sity
(V
2 /Hz)
Frequency (Hz)
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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Vetoes (1)
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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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
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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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)
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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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
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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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
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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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
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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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
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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Sofware Injections: Time errors
ALLEGRO: September 2005
AURIGA : July 2005
EXPLORER: December 2004
NAUTILUS: December 2004
SNR
Ter
r [
s ]
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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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
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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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
GWDAW10 - December 14th, 2005 - Brownsville, Texas
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)