detector characterization for burst searches by resonant detectors
DESCRIPTION
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 14 th to 17 th , 2005 Brownsville, Texas. Outline. AURIGA Spectrum - PowerPoint PPT PresentationTRANSCRIPT
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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
-9
-8
-7
-6
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)