Differences between revisions 2 and 4 (spanning 2 versions)

LCGT data analysis white paper --DRAFT

Contents

LCGT data analysis white paper --DRAFT
Introduction
Searches for signals from compact binary coalescence

Introduction

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

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

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

KAGRA/Subgroups/DAS/gw_search/white_paper_2009 (last edited 2012-06-06 18:26:45 by OsamuMiyakawa)

-  ⇤ ← Revision 2 as of 2009-05-09 14:17:23 → 
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+   ← Revision 4 as of 2009-05-09 14:18:29 → ⇥
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+Additions are marked like this.
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-'''LCGT data analysis white paper --DRAFT'''
<<TableofContents(2)>>
+= LCGT data analysis white paper --DRAFT =
<<TableOfContents(2)>>
 Line 5:
+= 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
-Line 6:
+Line 10:
-= Searches for signals from compact binary coalescence =
+.4.4 S5/VSR1 goals ..................................... 15
-Line 8:
+Line 12:
- == Gravitational waves from the coalescence of compact binary systems . . . . . . . . . . . . . 5
+.4.5 S6/VSR2 goals ..................................... 18
-Line 10:
+Line 14:
- == Sciencegoals .......................................... 6
+.4.6 Advanceddetectorera ................................. 22
-Line 12:
+Line 16:
- == SearchStrategies ........................................ 7
+Searches for general burst signals 23 3.1 SourcesofGravitationalWaveBursts ............................. 23
-Line 14:
+Line 18:
-  === Matched filtering .................................... 8
+.2 ScienceGoalsoftheBurstGroup ............................... 25
-Line 16:
+Line 20:
-  === Analysis pipeline .................................... 8
+.3 Recentscienceresults...................................... 27
-Line 18:
+Line 22:
-  === Background estimation ................................. 9
+.4 Searchpipelineoverview .................................... 28
-Line 20:
+Line 24:
-  === Instrumental and environmental vetoes ........................ 10
+.4.1 Detectionalgorithms .................................. 28
-Line 22:
+Line 26:
-  === Efficiency evaluation .................................. 10
+.4.2 Sourcelocationandwaveformreconstruction . . . . . . . . . . . . . . . . . . . . . 30 3.4.3 Dataqualityandvetoes................................. 30
-Line 24:
+Line 28:
-  === Follow-up of candidate events ............................. 10
+.4.4 Simulations....................................... 30
-Line 26:
+Line 30:
-  === Pipeline of pipelines .................................. 11
+.4.5 Background....................................... 31
-Line 28:
+Line 32:
-  === Uncertainties in theoretical waveforms. . . . . . . . . . . . . . . . . . . . . . . . . 11
+.4.6 Detectioncriteria .................................... 32
-Line 30:
+Line 34:
-  === Astrophysical rates ................................... 12
+.5 Statusandprospectsofburstsearches ............................. 32
-Line 32:
+Line 36:
-  === Externally triggered searches.............................. 12
+.5.1 Triggeredsearches ................................... 32
-Line 34:
+Line 38:
-  === Current status and goals..................................... 13
+.5.2 Untriggeredsearches .................................. 36
-Line 36:
+Line 40:
-  === Recently completed searches.............................. 13
+.6 Plansandprospectsfor2008-2009 ............................... 37
-Line 38:
+Line 42:
-  === Near-term priorities................................... 13
+.6.1 completionofS5/VSR1analysis ........................... 37
-Line 40:
+Line 44:
-  === Pipeline development.................................. 14
+.6.2 preparationofS6/VSR2(mid2009) .......................... 38
-Line 42:
+Line 46:
-.4.4 S5/VSR1 goals ..................................... 15
+.6.3 Developmentprojects ................................. 39
-Line 44:
+Line 48:
-.4.5 S6/VSR2 goals ..................................... 18
-Line 46:
+Line 50:
-.4.6 Advanceddetectorera ................................. 22
+LSC-Virgo data analysis white paper -DRAFT as of 2008/10/28
-Line 48:
+Line 52:
-Searches for general burst signals 23 
3.1 SourcesofGravitationalWaveBursts ............................. 23
+Searches for continuous-wave signals 40 4.1 Non-accretingpulsars...................................... 41
-Line 51:
+Line 54:
-.2 ScienceGoalsoftheBurstGroup ............................... 25
+.1.1 TimedomainBayesianmethod ............................ 41
-Line 53:
+Line 56:
-.3 Recentscienceresults...................................... 27
+.1.2 WideParameterSearchoftheCrabPulsar) . . . . . . . . . . . . . . . . . . . . . . 43 4.1.3 Virgotargetedsearches ................................ 43
-Line 55:
+Line 58:
-.4 Searchpipelineoverview .................................... 28
+.2 Non-pulsingnon-accretingneutronstars ............................ 44
-Line 57:
+Line 60:
-.4.1 Detectionalgorithms .................................. 28
+.2.1 CassiopeiaA ...................................... 45
-Line 59:
+Line 62:
-.4.2 Sourcelocationandwaveformreconstruction . . . . . . . . . . . . . . . . . . . . . 30 
3.4.3 Dataqualityandvetoes................................. 30
+.2.2 Virgosemi-targetedsearch ............................... 45
-Line 62:
+Line 64:
-.4.4 Simulations....................................... 30
+.2.3 Othertargets ...................................... 46
-Line 64:
+Line 66:
-.4.5 Background....................................... 31
+.3 Previouslyunknownnon-accretingobjects ........................... 46
-Line 66:
+Line 68:
-.4.6 Detectioncriteria .................................... 32
+.3.1 Semicoherentsearches ................................. 47
-Line 68:
+Line 70:
-.5 Statusandprospectsofburstsearches ............................. 32
+.3.2 Cross-correlationsearches ............................... 48
-Line 70:
+Line 72:
-.5.1 Triggeredsearches ................................... 32
+.3.3 Hierarchical Searches and Einstein@Home .................... 49
-Line 72:
+Line 74:
-.5.2 Untriggeredsearches .................................. 36
+.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
-Line 74:
+Line 76:
-.6 Plansandprospectsfor2008-2009 ............................... 37
+.4 Accretingneutronstars ..................................... 53
-Line 76:
+Line 78:
-.6.1 completionofS5/VSR1analysis ........................... 37
+.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
-Line 78:
+Line 80:
-.6.2 preparationofS6/VSR2(mid2009) .......................... 38
+Searches for stochastic backgrounds 57 5.1 Sources of Stochastic Gravitational-wave Background . . . . . . . . . . . . . . . . . . . . . 57 5.2 StochasticSearchMethod.................................... 57
-Line 80:
+Line 82:
-.6.3 Developmentprojects ................................. 39
+.2.1 All-SkySearch ..................................... 58
-Line 82:
+Line 84:
+.2.2 DirectionalSearch ................................... 59
-Line 84:
+Line 86:
-LSC-Virgo data analysis white paper -DRAFT as of 2008/10/28
+.2.3 Mapping ........................................ 59
-Line 86:
+Line 88:
-Searches for continuous-wave signals 40 
4.1 Non-accretingpulsars...................................... 41
+.2.4 Multi-baseline:LSC/VIRGOjointsearch . . . . . . . . . . . . . . . . . . . . . . . 60 5.2.5 H1H2All-SkySearch ................................. 61
-Line 89:
+Line 90:
-.1.1 TimedomainBayesianmethod ............................ 41
+.3 ResultsandPlans ........................................ 61
-Line 91:
+Line 92:
-.1.2 WideParameterSearchoftheCrabPulsar) . . . . . . . . . . . . . . . . . . . . . . 43 
4.1.3 Virgotargetedsearches ................................ 43
+.3.1 S4Results ....................................... 61
 Line 94:
-.2 Non-pulsingnon-accretingneutronstars ............................ 44
+.3.2 StatusofS5Searches.................................. 62
 Line 96:
-.2.1 CassiopeiaA ...................................... 45
+.3.3 PlansforS6Searches.................................. 63
 Line 98:
-.2.2 Virgosemi-targetedsearch ............................... 45
+The characterization of the data 64 6.1 LIGODetectorCharacterization ................................ 64
 Line 100:
-.2.3 Othertargets ...................................... 46
+.1.1 Introduction....................................... 64
 Line 102:
-.3 Previouslyunknownnon-accretingobjects ........................... 46
+.1.2 StorageofDataQualityInformation ......................... 65
 Line 104:
-.3.1 Semicoherentsearches ................................. 47
+.1.3 SoftwareInfrastructure ................................. 66
 Line 106:
-.3.2 Cross-correlationsearches ............................... 48
+.1.4 Calibrations....................................... 68
 Line 108:
-.3.3 Hierarchical Searches and Einstein@Home 
.................... 49
+.1.5 Timing ......................................... 69
-Line 111:
+Line 110:
-.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
+.1.6 GlitchInvestigations .................................. 70
-Line 116:
+Line 112:
-.4 Accretingneutronstars ..................................... 53
+.1.7 EnvironmentalDisturbances .............................. 71
-Line 118:
+Line 114:
-.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
+.1.8 DataRunSupport.................................... 72
-Line 124:
+Line 116:
-Searches for stochastic backgrounds 57 
5.1 Sources of Stochastic Gravitational-wave Background . . . . . . . . . . . . . . . . . . . . . 57 
5.2 StochasticSearchMethod.................................... 57
+.1.9 LSCPresenceattheObservatories........................... 73
-Line 128:
+Line 118:
-.2.1 All-SkySearch ..................................... 58
-Line 130:
+Line 120:
-.2.2 DirectionalSearch ................................... 59
+LSC-Virgo data analysis white paper -DRAFT as of 2008/10/28
-Line 132:
+Line 122:
-.2.3 Mapping ........................................ 59
+.2 GEODetectorCharacterization................................. 73
-Line 134:
+Line 124:
-.2.4 Multi-baseline:LSC/VIRGOjointsearch . . . . . . . . . . . . . . . . . . . . . . . 60 
5.2.5 H1H2All-SkySearch ................................. 61
+.2.1 Introduction....................................... 73
-Line 137:
+Line 126:
-.3 ResultsandPlans ........................................ 61
+.2.2 DataAcquisitionandtiming .............................. 74
-Line 139:
+Line 128:
-.3.1 S4Results ....................................... 61
+.2.3 Straincalibration .................................... 74
-Line 141:
+Line 130:
-.3.2 StatusofS5Searches.................................. 62
+.2.4 Glitchstudies ...................................... 75
-Line 143:
+Line 132:
-.3.3 PlansforS6Searches.................................. 63
+.2.5 Dataquality....................................... 76
-Line 145:
+Line 134:
-The characterization of the data 64 
6.1 LIGODetectorCharacterization ................................ 64
+.2.6 GEOdetectoranddatacharacterisationpost-S5 . . . . . . . . . . . . . . . . . . . . 77 6.3 VirgoDetectorCharacterization ................................ 78
-Line 148:
+Line 136:
-.1.1 Introduction....................................... 64
+.3.1 Introduction....................................... 78
-Line 150:
+Line 138:
-.1.2 StorageofDataQualityInformation ......................... 65
+.3.2 Detectorstatusmonitors ................................ 78
-Line 152:
+Line 140:
-.1.3 SoftwareInfrastructure ................................. 66
+.3.3 CalibrationandHardwareInjections .......................... 79
-Line 154:
+Line 142:
-.1.4 Calibrations....................................... 68
+.3.4 Noisestudies ...................................... 79
-Line 156:
+Line 144:
-.1.5 Timing ......................................... 69
+.3.5 DC resulting from the searches for impulsive events . . . . . . . . . . . . . . . . . 80 7 Computing and Software 81 7.1 Currentstatus .......................................... 81
-Line 158:
+Line 146:
-.1.6 GlitchInvestigations .................................. 70
+.2 ActivitiesinsupportofLDGOperations ............................ 82
-Line 160:
+Line 148:
-.1.7 EnvironmentalDisturbances .............................. 71
+.3 DataAnalysisSoftwareDevelopmentActivities . . . . . . . . . . . . . . . . . . . . . . . . 83 7.4 Intermediate-termdevelopmentactivities............................ 85
-Line 162:
+Line 150:
-.1.8 DataRunSupport.................................... 72
+.5 Long-termgoals......................................... 87
-Line 164:
+Line 152:
-.1.9 LSCPresenceattheObservatories........................... 73
+.6 Virgocomputingandsoftware ................................. 88
-Line 166:
+Line 154:
+.6.1 ComputingattheEGO/Virgosite ........................... 88
-Line 168:
+Line 156:
-LSC-Virgo data analysis white paper -DRAFT as of 2008/10/28
+.6.2 ComputingatCNAF(Bologna,Italy) ......................... 89
-Line 170:
+Line 158:
-.2 GEODetectorCharacterization................................. 73
+.6.3 ComputingatCCIN2P3(Lyon,France) ........................ 89
-Line 172:
+Line 160:
-.2.1 Introduction....................................... 73
+.6.4 Virgosoftware ..................................... 89
-Line 174:
+Line 162:
-.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
+References 90 4