KAGRA gravitational-wave detector
E717889
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.
All labels observed (4)
| Label | Occurrences |
|---|---|
| KAGRA | 2 |
| KAGRA Collaboration | 2 |
| KAGRA gravitational wave detector | 1 |
| KAGRA gravitational-wave detector canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8175000 — 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: KAGRA gravitational-wave detector Context triple: [Kamioka Observatory, knownFor, KAGRA gravitational-wave detector]
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A.
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.
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B.
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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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.
Gravitational Wave Project Office
The Gravitational Wave Project Office is a research division focused on the detection and study of gravitational waves within the Institute for Cosmic Ray Research.
- 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: KAGRA gravitational-wave detector Target entity description: 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.
-
A.
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.
-
B.
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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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.
Gravitational Wave Project Office
The Gravitational Wave Project Office is a research division focused on the detection and study of gravitational waves within the Institute for Cosmic Ray Research.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
gravitational-wave observatory
ⓘ
laser interferometer ⓘ underground observatory ⓘ |
| abbreviation | LCGT NERFINISHED ⓘ |
| alsoKnownAs |
KAGRA
NERFINISHED
ⓘ
Large-scale Cryogenic Gravitational Wave Telescope NERFINISHED ⓘ |
| armLength | 3 km ⓘ |
| collaboration | KAGRA Collaboration NERFINISHED ⓘ |
| configuration | Michelson interferometer with Fabry–Pérot arm cavities ⓘ |
| constructionStart | 2010 ⓘ |
| coolingMethod | cryogenic cooling with sapphire mirrors ⓘ |
| country | Japan ⓘ |
| designedBy | KAGRA Collaboration NERFINISHED ⓘ |
| feature |
cryogenically cooled test masses
ⓘ
input and output mode cleaners ⓘ power-recycling mirror ⓘ signal-recycling mirror ⓘ suspended mirrors ⓘ underground tunnels for seismic noise reduction ⓘ vacuum system in interferometer arms ⓘ |
| firstObservationRunParticipation | O3 (joint run with LIGO and Virgo, late phase) NERFINISHED ⓘ |
| firstOperation | 2016 ⓘ |
| fundingSource |
Japanese government
NERFINISHED
ⓘ
Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan NERFINISHED ⓘ |
| hostInstitution | University of Tokyo NERFINISHED ⓘ |
| locatedIn | Kamioka mine NERFINISHED ⓘ |
| locatedUndergroundDepth | approximately 200 m ⓘ |
| location | Kamioka, Gifu Prefecture, Japan NERFINISHED ⓘ |
| namedAfter | Kamioka Gravitational Wave Detector (KAmioka GRAvitational wave) NERFINISHED ⓘ |
| noiseReductionStrategy |
seismic isolation
ⓘ
thermal noise reduction via cryogenics ⓘ |
| numberOfArms | 2 ⓘ |
| operator |
High Energy Accelerator Research Organization (KEK)
NERFINISHED
ⓘ
Institute for Cosmic Ray Research, University of Tokyo NERFINISHED ⓘ National Astronomical Observatory of Japan NERFINISHED ⓘ |
| partnerDetector |
GEO600
NERFINISHED
ⓘ
LIGO NERFINISHED ⓘ Virgo NERFINISHED ⓘ |
| partOfNetwork | global network of gravitational-wave detectors ⓘ |
| predecessorName | LCGT project NERFINISHED ⓘ |
| region | Hida region, Gifu Prefecture NERFINISHED ⓘ |
| researchOutput | gravitational-wave data for astrophysical analysis ⓘ |
| scienceGoal |
detection of gravitational waves
ⓘ
multi-messenger astronomy with gravitational waves ⓘ observation of compact binary coalescences ⓘ study of neutron star equation of state ⓘ tests of general relativity ⓘ |
| scientificDiscipline |
experimental physics
ⓘ
gravitational-wave astronomy ⓘ |
| testMassMaterial | sapphire ⓘ |
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: KAGRA gravitational-wave detector Description of subject: 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.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Kamioka Observatory
subject surface form:
Kamioka Observatory
this entity surface form:
KAGRA
this entity surface form:
KAGRA Collaboration
this entity surface form:
KAGRA Collaboration
this entity surface form:
KAGRA gravitational wave detector
LIGO (Laser Interferometer Gravitational-Wave Observatory)
→
collaboratesWith
→
KAGRA gravitational-wave detector
ⓘ
subject surface form:
LIGO
this entity surface form:
KAGRA