GW170814
E732408
GW170814 is a gravitational-wave signal detected in 2017 from the merger of two stellar-mass black holes, notable for being observed jointly by the LIGO and Virgo detectors.
All labels observed (1)
| Label | Occurrences |
|---|---|
| GW170814 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8396813 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: GW170814 Context triple: [Virgo Collaboration, contributedToDiscovery, GW170814]
-
A.
GW150914
GW150914 is the first directly detected gravitational-wave signal, produced by the merger of two stellar-mass black holes and marking the beginning of gravitational-wave astronomy.
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B.
LIGO–Virgo–KAGRA network
The LIGO–Virgo–KAGRA network is an international collaboration of ground-based gravitational-wave observatories that jointly detect and analyze ripples in spacetime from cosmic events like merging black holes and neutron stars.
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C.
LIGO Scientific Collaboration
The LIGO Scientific Collaboration is an international group of scientists and institutions that built and operate the LIGO detectors and made the first direct detection of gravitational waves, confirming a key prediction of Einstein’s general relativity.
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D.
KAGRA gravitational-wave detector
The KAGRA gravitational-wave detector is a large-scale underground interferometer in Japan that uses cryogenically cooled mirrors to detect ripples in spacetime from cosmic events.
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E.
LIGO (Laser Interferometer Gravitational-Wave Observatory)
LIGO (Laser Interferometer Gravitational-Wave Observatory) is a large-scale physics experiment and observatory designed to detect and study gravitational waves using highly sensitive laser interferometry.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: GW170814 Target entity description: GW170814 is a gravitational-wave signal detected in 2017 from the merger of two stellar-mass black holes, notable for being observed jointly by the LIGO and Virgo detectors.
-
A.
GW150914
GW150914 is the first directly detected gravitational-wave signal, produced by the merger of two stellar-mass black holes and marking the beginning of gravitational-wave astronomy.
-
B.
LIGO–Virgo–KAGRA network
The LIGO–Virgo–KAGRA network is an international collaboration of ground-based gravitational-wave observatories that jointly detect and analyze ripples in spacetime from cosmic events like merging black holes and neutron stars.
-
C.
LIGO Scientific Collaboration
The LIGO Scientific Collaboration is an international group of scientists and institutions that built and operate the LIGO detectors and made the first direct detection of gravitational waves, confirming a key prediction of Einstein’s general relativity.
-
D.
KAGRA gravitational-wave detector
The KAGRA gravitational-wave detector is a large-scale underground interferometer in Japan that uses cryogenically cooled mirrors to detect ripples in spacetime from cosmic events.
-
E.
LIGO (Laser Interferometer Gravitational-Wave Observatory)
LIGO (Laser Interferometer Gravitational-Wave Observatory) is a large-scale physics experiment and observatory designed to detect and study gravitational waves using highly sensitive laser interferometry.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical transient
ⓘ
binary black hole merger ⓘ gravitational-wave event ⓘ |
| announcedOn | 2017-09-27 ⓘ |
| belongsToObservingRun | LIGO-Virgo O2 NERFINISHED ⓘ |
| detectedBy |
LIGO
NERFINISHED
ⓘ
Virgo NERFINISHED ⓘ |
| detectedByInstrument |
Advanced LIGO
NERFINISHED
ⓘ
Advanced Virgo NERFINISHED ⓘ |
| hasCatalogInclusion | GWTC-1 gravitational-wave transient catalog NERFINISHED ⓘ |
| hasChirpMass | ~24 solar masses ⓘ |
| hasComponentSpinConstraint | low effective spin ⓘ |
| hasCosmologyAssumption | standard Lambda-CDM cosmology ⓘ |
| hasDataRelease | strain time series publicly available ⓘ |
| hasDeclinationUncertainty | tens of square degrees ⓘ |
| hasDetectionDate | 2017-08-14 ⓘ |
| hasDetectionMethod | gravitational-wave interferometry ⓘ |
| hasDetectorSite |
LIGO Hanford Observatory
NERFINISHED
ⓘ
LIGO Livingston Observatory NERFINISHED ⓘ Virgo detector at Cascina, Italy NERFINISHED ⓘ |
| hasElectromagneticCounterpartDetected | no ⓘ |
| hasEventNameConvention | date-based YYMMDD format ⓘ |
| hasFalseAlarmRate | less than 1 in 27,000 years ⓘ |
| hasFinalBlackHoleMass | 53.2 solar masses ⓘ |
| hasFinalBlackHoleSpin | dimensionless spin ~0.7 ⓘ |
| hasHostGalaxyIdentified | no ⓘ |
| hasLuminosityDistance |
1.8 billion light-years
ⓘ
540 million parsecs ⓘ |
| hasMassRatio | ~1.2 ⓘ |
| hasNetworkSignificance | >5 sigma ⓘ |
| hasPolarizationMeasurement | constrains tensor polarizations ⓘ |
| hasPrimaryBlackHoleMass | 30.5 solar masses ⓘ |
| hasRadiatedEnergy | about 3 solar masses c^2 ⓘ |
| hasRedshift | 0.12 ⓘ |
| hasRightAscensionUncertainty | tens of square degrees ⓘ |
| hasSecondaryBlackHoleMass | 25.3 solar masses ⓘ |
| hasSignalToNoiseRatio | ~15.9 ⓘ |
| hasSkyLocalizationArea | about 60 square degrees ⓘ |
| hasSkyLocalizationImprovementFactor | about 10 ⓘ |
| hasSourceFrameTotalMass | ~56 solar masses ⓘ |
| hasSourceType | stellar-mass black hole binary ⓘ |
| hasWaveformType | inspiral-merger-ringdown ⓘ |
| isConsistentWithGeneralRelativity | yes ⓘ |
| isFirstOfType |
first LIGO-Virgo joint detection of a binary black hole merger
ⓘ
first binary black hole merger observed by three detectors ⓘ |
| reportedInCollaborationPaper | LIGO Scientific Collaboration and Virgo Collaboration NERFINISHED ⓘ |
| testsGeneralRelativity | yes ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: GW170814 Description of subject: GW170814 is a gravitational-wave signal detected in 2017 from the merger of two stellar-mass black holes, notable for being observed jointly by the LIGO and Virgo detectors.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.