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| === Matched filtering == === Analysis pipeline === === Background estimation === === Instrumental and environmental vetoes ........................ 10 === Efficiency evaluation .................................. 10 === Follow-up of candidate events ............................. 10 === Pipeline of pipelines .................................. 11 === Uncertainties in theoretical waveforms. . . . . . . . . . . . . . . . . . . . . . . . . 11 === Astrophysical rates ................................... 12 === Externally triggered searches.............................. 12 === Current status and goals..................................... 13 === Recently completed searches.............................. 13 === Near-term priorities................................... 13 === Pipeline development.................................. 14 |
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| 2.4.4 S5/VSR1 goals ..................................... 15 | |
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| 2.4.5 S6/VSR2 goals ..................................... 18 | = Searches for general burst signals = == Sources == == Science Goals == == Search pipeline overview == |
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| 2.4.6 Advanceddetectorera ................................. 22 | = Searches for continuous-wave signals = == Non-accreting pulsars == == Non-pulsingnon-accreting neutron stars == == Previously unknown non-accreting objects == == Accreting neutron stars == |
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| 3 Searches for general burst signals 23 3.1 SourcesofGravitationalWaveBursts ............................. 23 | |
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| 3.2 ScienceGoalsoftheBurstGroup ............................... 25 | = Searches for stochastic backgrounds = == Sources == == Stochastic Search Method == == Results and Plans == |
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| 3.3 Recentscienceresults...................................... 27 | |
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| 3.4 Searchpipelineoverview .................................... 28 | = The characterization of the data = == LIGO Detector Characterization == == GEO Detector Characterization == == Virgo Detector Characterization == |
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| 3.4.1 Detectionalgorithms .................................. 28 | |
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| 3.4.2 Sourcelocationandwaveformreconstruction . . . . . . . . . . . . . . . . . . . . . 30 3.4.3 Dataqualityandvetoes................................. 30 3.4.4 Simulations....................................... 30 3.4.5 Background....................................... 31 3.4.6 Detectioncriteria .................................... 32 3.5 Statusandprospectsofburstsearches ............................. 32 3.5.1 Triggeredsearches ................................... 32 3.5.2 Untriggeredsearches .................................. 36 3.6 Plansandprospectsfor2008-2009 ............................... 37 3.6.1 completionofS5/VSR1analysis ........................... 37 3.6.2 preparationofS6/VSR2(mid2009) .......................... 38 3.6.3 Developmentprojects ................................. 39 2 LSC-Virgo data analysis white paper -DRAFT as of 2008/10/28 4 Searches for continuous-wave signals 40 4.1 Non-accretingpulsars...................................... 41 4.1.1 TimedomainBayesianmethod ............................ 41 4.1.2 WideParameterSearchoftheCrabPulsar) . . . . . . . . . . . . . . . . . . . . . . 43 4.1.3 Virgotargetedsearches ................................ 43 4.2 Non-pulsingnon-accretingneutronstars ............................ 44 4.2.1 CassiopeiaA ...................................... 45 4.2.2 Virgosemi-targetedsearch ............................... 45 4.2.3 Othertargets ...................................... 46 4.3 Previouslyunknownnon-accretingobjects ........................... 46 4.3.1 Semicoherentsearches ................................. 47 4.3.2 Cross-correlationsearches ............................... 48 4.3.3 Hierarchical Searches and Einstein@Home .................... 49 4.3.4 Searchesforsourcesinglobularclusters . . . . . . . . . . . . . . . . . . . . . . . 50 4.3.5 Searchesforsourcesnearthegalacticcenter . . . . . . . . . . . . . . . . . . . . . 51 4.3.6 Semi-targeted searches for “transient CW signals” . . . . . . . . . . . . . . . . . . 51 4.3.7 Virgoblindsearches .................................. 52 4.4 Accretingneutronstars ..................................... 53 4.4.1 Cross-correlation searches for known binary systems . . . . . . . . . . . . . . . . . 53 4.4.2 Sidebandsearchforknownbinarysystems . . . . . . . . . . . . . . . . . . . . . . 54 4.4.3 TwoSpectsearchforunknownbinarysystems . . . . . . . . . . . . . . . . . . . . 55 4.4.4 Quadraticsearchforunknownbinarysystems . . . . . . . . . . . . . . . . . . . . 55 4.5 NeedsandplansforS6/VSR2 ................................. 56 5 Searches for stochastic backgrounds 57 5.1 Sources of Stochastic Gravitational-wave Background . . . . . . . . . . . . . . . . . . . . . 57 5.2 StochasticSearchMethod.................................... 57 5.2.1 All-SkySearch ..................................... 58 5.2.2 DirectionalSearch ................................... 59 5.2.3 Mapping ........................................ 59 5.2.4 Multi-baseline:LSC/VIRGOjointsearch . . . . . . . . . . . . . . . . . . . . . . . 60 5.2.5 H1H2All-SkySearch ................................. 61 5.3 ResultsandPlans ........................................ 61 5.3.1 S4Results ....................................... 61 5.3.2 StatusofS5Searches.................................. 62 5.3.3 PlansforS6Searches.................................. 63 6 The characterization of the data 64 6.1 LIGODetectorCharacterization ................................ 64 6.1.1 Introduction....................................... 64 6.1.2 StorageofDataQualityInformation ......................... 65 6.1.3 SoftwareInfrastructure ................................. 66 6.1.4 Calibrations....................................... 68 6.1.5 Timing ......................................... 69 6.1.6 GlitchInvestigations .................................. 70 6.1.7 EnvironmentalDisturbances .............................. 71 6.1.8 DataRunSupport.................................... 72 6.1.9 LSCPresenceattheObservatories........................... 73 3 LSC-Virgo data analysis white paper -DRAFT as of 2008/10/28 6.2 GEODetectorCharacterization................................. 73 6.2.1 Introduction....................................... 73 6.2.2 DataAcquisitionandtiming .............................. 74 6.2.3 Straincalibration .................................... 74 6.2.4 Glitchstudies ...................................... 75 6.2.5 Dataquality....................................... 76 6.2.6 GEOdetectoranddatacharacterisationpost-S5 . . . . . . . . . . . . . . . . . . . . 77 6.3 VirgoDetectorCharacterization ................................ 78 6.3.1 Introduction....................................... 78 6.3.2 Detectorstatusmonitors ................................ 78 6.3.3 CalibrationandHardwareInjections .......................... 79 6.3.4 Noisestudies ...................................... 79 6.3.5 DC resulting from the searches for impulsive events . . . . . . . . . . . . . . . . . 80 7 Computing and Software 81 7.1 Currentstatus .......................................... 81 7.2 ActivitiesinsupportofLDGOperations ............................ 82 7.3 DataAnalysisSoftwareDevelopmentActivities . . . . . . . . . . . . . . . . . . . . . . . . 83 7.4 Intermediate-termdevelopmentactivities............................ 85 7.5 Long-termgoals......................................... 87 7.6 Virgocomputingandsoftware ................................. 88 7.6.1 ComputingattheEGO/Virgosite ........................... 88 7.6.2 ComputingatCNAF(Bologna,Italy) ......................... 89 7.6.3 ComputingatCCIN2P3(Lyon,France) ........................ 89 7.6.4 Virgosoftware ..................................... 89 References 90 4 |
= Computing and Software = == Current status == == Activities in support of LDG Operations == == Data Analysis Software Development Activities == == Intermediate-term development activities == == Long-term goals == == Virgo computing and software == |
LCGT data analysis white paper --DRAFT
Contents
Introduction
Searches for signals from compact binary coalescence
Gravitational waves from the coalescence of compact binary systems
Science goals
Search Strategies
Searches for general burst signals
Sources
Science Goals
Search pipeline overview
Searches for continuous-wave signals
Non-accreting pulsars
Non-pulsingnon-accreting neutron stars
Previously unknown non-accreting objects
Accreting neutron stars
Searches for stochastic backgrounds
Sources
Stochastic Search Method
Results and Plans
The characterization of the data
LIGO Detector Characterization
GEO Detector Characterization
Virgo Detector Characterization
Computing and Software
Current status
Activities in support of LDG Operations
Data Analysis Software Development Activities
Intermediate-term development activities
Long-term goals