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'''LCGT data analysis white paper --DRAFT''' |
= LCGT data analysis white paper --DRAFT = |
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= Introduction = | == Introduction == |
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= Searches for signals from compact binary coalescence = == Gravitational waves from the coalescence of compact binary systems . . . . . . . . . . . . . 5 == Sciencegoals .......................................... 6 == SearchStrategies ........................................ 7 === Matched filtering .................................... 8 === Analysis pipeline .................................... 8 === Background estimation ................................. 9 === 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 2.4.4 S5/VSR1 goals ..................................... 15 2.4.5 S6/VSR2 goals ..................................... 18 2.4.6 Advanceddetectorera ................................. 22 3 Searches for general burst signals 23 3.1 SourcesofGravitationalWaveBursts ............................. 23 3.2 ScienceGoalsoftheBurstGroup ............................... 25 3.3 Recentscienceresults...................................... 27 3.4 Searchpipelineoverview .................................... 28 3.4.1 Detectionalgorithms .................................. 28 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 |
== Searches for signals from compact binary coalescence == |
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= Searches for general burst signals = | |
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6.3.5 DC resulting from the searches for impulsive events . . . . . . . . . . . . . . . . . 80 7 Computing and Software 81 7.1 Currentstatus .......................................... 81 |
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7.2 ActivitiesinsupportofLDGOperations ............................ 82 | = Searches for continuous-wave signals = |
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7.3 DataAnalysisSoftwareDevelopmentActivities . . . . . . . . . . . . . . . . . . . . . . . . 83 7.4 Intermediate-termdevelopmentactivities............................ 85 |
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7.5 Long-termgoals......................................... 87 | = Searches for stochastic backgrounds = |
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7.6 Virgocomputingandsoftware ................................. 88 | |
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7.6.1 ComputingattheEGO/Virgosite ........................... 88 | = The characterization of the data = |
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7.6.2 ComputingatCNAF(Bologna,Italy) ......................... 89 | |
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7.6.3 ComputingatCCIN2P3(Lyon,France) ........................ 89 7.6.4 Virgosoftware ..................................... 89 References 90 4 |
= Computing and Software = |
LCGT data analysis white paper --DRAFT
Contents
Introduction
Searches for signals from compact binary coalescence
Searches for general burst signals
Searches for continuous-wave signals
Searches for stochastic backgrounds
The characterization of the data