GW170817
E734728
GW170817 is the first observed gravitational-wave signal from a binary neutron star merger, famously accompanied by electromagnetic counterparts across the spectrum.
All labels observed (1)
| Label | Occurrences |
|---|---|
| GW170817 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8396814 — 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: GW170817 Context triple: [Virgo Collaboration, contributedToDiscovery, GW170817]
-
A.
GW170814
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.
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B.
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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C.
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.
-
D.
IGO
IGO is the ICAO airline designator for IndiGo, a major low-cost carrier based in India.
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E.
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.
- 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: GW170817 Target entity description: GW170817 is the first observed gravitational-wave signal from a binary neutron star merger, famously accompanied by electromagnetic counterparts across the spectrum.
-
A.
GW170814
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.
-
B.
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.
-
C.
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.
-
D.
IGO
IGO is the ICAO airline designator for IndiGo, a major low-cost carrier based in India.
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E.
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.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical event
ⓘ
binary neutron star merger ⓘ gravitational-wave event ⓘ |
| announcementDate | 2017-10-16 ⓘ |
| binaryComponentType | neutron star ⓘ |
| componentMassRange | about 1.1 to 1.6 solar masses ⓘ |
| detectedBy |
LIGO
NERFINISHED
ⓘ
Virgo NERFINISHED ⓘ |
| distanceFromEarth |
about 130 million light-years
ⓘ
about 40 megaparsecs ⓘ |
| enabledMeasurement | Hubble constant ⓘ |
| eventDate | 2017-08-17 ⓘ |
| gravitationalWaveFrequencyRange | about 30 to 3000 hertz ⓘ |
| hasDiscoveryMethod |
electromagnetic observation
ⓘ
gravitational-wave detection ⓘ |
| hasElectromagneticCounterpart |
AT 2017gfo
NERFINISHED
ⓘ
GRB 170817A NERFINISHED ⓘ X-ray afterglow ⓘ infrared transient ⓘ kilonova ⓘ optical transient ⓘ radio afterglow ⓘ short gamma-ray burst ⓘ |
| hasHostGalaxy | NGC 4993 NERFINISHED ⓘ |
| hasSignificance |
first gravitational-wave detection from a binary neutron star merger
ⓘ
first multi-messenger observation combining gravitational waves and light from the same source ⓘ |
| hostGalaxyConstellation | Hydra NERFINISHED ⓘ |
| hostGalaxyType | lenticular galaxy ⓘ |
| numberOfComponents | 2 ⓘ |
| observedBy |
Chandra X-ray Observatory
NERFINISHED
ⓘ
Fermi Gamma-ray Space Telescope NERFINISHED ⓘ Hubble Space Telescope NERFINISHED ⓘ INTEGRAL NERFINISHED ⓘ many ground-based telescopes worldwide ⓘ |
| observedIn |
X-rays
ⓘ
gamma rays ⓘ gravitational waves ⓘ infrared ⓘ optical ⓘ radio ⓘ ultraviolet ⓘ |
| produced |
gold
ⓘ
platinum ⓘ r-process heavy elements ⓘ |
| providedEvidenceFor |
kilonova emission from r-process nucleosynthesis
ⓘ
origin of short gamma-ray bursts in binary neutron star mergers ⓘ |
| signalDuration | about 100 seconds ⓘ |
| tested | general relativity NERFINISHED ⓘ |
| totalMass | about 2.7 solar masses ⓘ |
| usedAs | standard siren ⓘ |
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: GW170817 Description of subject: GW170817 is the first observed gravitational-wave signal from a binary neutron star merger, famously accompanied by electromagnetic counterparts across the spectrum.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.