GW150914
E730519
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| GW150914 canonical | 5 |
| Observation of Gravitational Waves from a Binary Black Hole Merger | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8396758 — 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: GW150914 Context triple: [LIGO Scientific Collaboration, discoveredEvent, GW150914]
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A.
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.
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B.
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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C.
IGO
IGO is the ICAO airline designator for IndiGo, a major low-cost carrier based in India.
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D.
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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E.
TAMA 300 gravitational wave detector (historical)
The TAMA 300 gravitational wave detector is a pioneering Japanese laser interferometer experiment that contributed to early gravitational wave research and technology development before the advent of larger observatories like LIGO and Virgo.
- 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: GW150914 Target entity description: 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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A.
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.
-
B.
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.
-
C.
IGO
IGO is the ICAO airline designator for IndiGo, a major low-cost carrier based in India.
-
D.
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.
-
E.
TAMA 300 gravitational wave detector (historical)
The TAMA 300 gravitational wave detector is a pioneering Japanese laser interferometer experiment that contributed to early gravitational wave research and technology development before the advent of larger observatories like LIGO and Virgo.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
LIGO detection
ⓘ
astrophysical event ⓘ binary black hole merger ⓘ |
| announcedOn | 2016-02-11 ⓘ |
| catalogName | GW150914 ⓘ |
| componentSpins | low ⓘ |
| dataRelease | publicly available ⓘ |
| detectedAt |
LIGO Hanford Observatory
ⓘ
LIGO Livingston Observatory ⓘ |
| discoveredBy |
LIGO Scientific Collaboration
ⓘ
Virgo Collaboration ⓘ |
| distanceFromEarth | about 1.3 billion light-years ⓘ |
| falseAlarmProbability | less than 1 in 200000 ⓘ |
| generalRelativityConsistent | yes ⓘ |
| hasDiscoveryMethod | direct gravitational-wave detection ⓘ |
| hasEventDate | 2015-09-14 ⓘ |
| hasPhases |
inspiral
ⓘ
merger ⓘ ringdown ⓘ |
| hasPolarizations |
cross polarization
ⓘ
plus polarization ⓘ |
| hasProgenitor | binary system of stellar-mass black holes ⓘ |
| hasSignificance |
beginning of gravitational-wave astronomy
ⓘ
first direct detection of gravitational waves ⓘ first observed binary black hole merger ⓘ |
| hostGalaxyLocation | unknown ⓘ |
| inspiralTimeInBand | about 0.2 seconds ⓘ |
| luminosityPeak | about 3.6×10^49 watts ⓘ |
| namedAfter | gravitational wave and date 2015-09-14 ⓘ |
| observatoryNetwork | Advanced LIGO ⓘ |
| paperTitle |
Observation of Gravitational Waves from a Binary Black Hole Merger
ⓘ
linked to:
GW150914
|
| primaryBlackHoleMass | about 36 solar masses ⓘ |
| publicationDate | 2016-02-11 ⓘ |
| publishedIn | Physical Review Letters ⓘ |
| radiatedEnergy |
about 3 solar masses c^2
ⓘ
about 5×10^47 joules ⓘ |
| redshift | about 0.09 ⓘ |
| remnantBlackHoleMass | about 62 solar masses ⓘ |
| secondaryBlackHoleMass | about 29 solar masses ⓘ |
| signalDuration | 0.2 seconds ⓘ |
| signalFrequencyRange | 35–250 Hz ⓘ |
| signalToNoiseRatio | 24 ⓘ |
| signalType | chirp ⓘ |
| skyLocalizationArea | about 600 square degrees ⓘ |
| sourceType | stellar-mass black hole binary ⓘ |
| testsGeneralRelativity | yes ⓘ |
| waveformModel | general relativity binary black hole coalescence ⓘ |
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: GW150914 Description of subject: 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.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.