first binary pulsar PSR B1913+16
E267990
PSR B1913+16 is a landmark binary pulsar system whose precisely measured orbital decay provided the first strong indirect evidence for the existence of gravitational waves, leading to a Nobel Prize in Physics.
All labels observed (6)
How this entity was disambiguated
This entity first appeared as the object of triple T2458910 — 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: first binary pulsar PSR B1913+16 Context triple: [Arecibo Observatory, discovered, first binary pulsar PSR B1913+16]
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A.
neutron star hypothesis
The neutron star hypothesis is Fritz Zwicky’s pioneering proposal that supernova explosions leave behind extremely dense stellar remnants composed primarily of neutrons, now known as neutron stars.
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B.
Gravity Probe B experiment
Gravity Probe B experiment was a NASA-led satellite mission designed to precisely measure how Earth's gravity warps space and time, providing a high-accuracy test of key predictions of Einstein's general relativity.
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C.
Cocconi
Cocconi is an Italian surname most notably associated with physicist Giuseppe Cocconi, a pioneer in particle physics and early SETI research.
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D.
Tolman surface brightness test
The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
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E.
Ives–Stilwell experiment
The Ives–Stilwell experiment is a classic test of special relativity that measured the relativistic Doppler effect to confirm time dilation for fast-moving ions.
- 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: first binary pulsar PSR B1913+16 Target entity description: PSR B1913+16 is a landmark binary pulsar system whose precisely measured orbital decay provided the first strong indirect evidence for the existence of gravitational waves, leading to a Nobel Prize in Physics.
-
A.
neutron star hypothesis
The neutron star hypothesis is Fritz Zwicky’s pioneering proposal that supernova explosions leave behind extremely dense stellar remnants composed primarily of neutrons, now known as neutron stars.
-
B.
Gravity Probe B experiment
Gravity Probe B experiment was a NASA-led satellite mission designed to precisely measure how Earth's gravity warps space and time, providing a high-accuracy test of key predictions of Einstein's general relativity.
-
C.
Cocconi
Cocconi is an Italian surname most notably associated with physicist Giuseppe Cocconi, a pioneer in particle physics and early SETI research.
-
D.
Tolman surface brightness test
The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.
-
E.
Ives–Stilwell experiment
The Ives–Stilwell experiment is a classic test of special relativity that measured the relativistic Doppler effect to confirm time dilation for fast-moving ions.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
binary pulsar
ⓘ
neutron star binary system ⓘ radio pulsar ⓘ |
| agreementWithGR | orbital decay matches general relativity prediction within observational uncertainties ⓘ |
| alternativeName |
Hulse–Taylor binary pulsar
ⓘ
linked to:
first binary pulsar PSR B1913+16
PSR J1915+1606 ⓘ
linked to:
first binary pulsar PSR B1913+16
|
| binaryType | double neutron star binary ⓘ |
| catalogDesignation |
PSR B1913+16
ⓘ
linked to:
first binary pulsar PSR B1913+16
PSR J1915+1606 ⓘ
linked to:
first binary pulsar PSR B1913+16
|
| componentType | neutron star ⓘ |
| discoveredBy |
Joseph Hooton Taylor Jr.
ⓘ
Russell Alan Hulse ⓘ |
| discoveredWith | Arecibo Observatory ⓘ |
| discoveryYear | 1974 ⓘ |
| distanceFromEarth | about 21000 light-years ⓘ |
| emissionType | radio emission ⓘ |
| evidenceType | indirect detection of gravitational waves ⓘ |
| expectedMergerTime | about 300 million years ⓘ |
| galacticPopulation | Galactic disk ⓘ |
| hasRelativisticEffects |
Shapiro delay
ⓘ
gravitational redshift and time dilation ⓘ periastron advance ⓘ |
| hostGalaxy | Milky Way ⓘ |
| locatedInConstellation | Aquila ⓘ |
| massOfCompanion | about 1.39 solar masses ⓘ |
| massOfPrimary | about 1.44 solar masses ⓘ |
| nobelPrizeCitation | for the discovery of a new type of pulsar, a discovery that has opened up new possibilities for the study of gravitation ⓘ |
| nobelPrizeLaureate |
Joseph Hooton Taylor Jr.
ⓘ
Russell Alan Hulse ⓘ |
| numberOfComponents | 2 ⓘ |
| orbitalDecayCause | gravitational wave emission ⓘ |
| orbitalDecayRate | about −2.4×10⁻¹² s/s ⓘ |
| orbitalEccentricity | about 0.617 ⓘ |
| orbitalPeriod | about 7.75 hours ⓘ |
| periastronAdvance | about 4.2 degrees per year ⓘ |
| providedEvidenceFor | existence of gravitational waves ⓘ |
| pulsarSpinPeriod | about 59 milliseconds ⓘ |
| relatedNobelPrize | 1993 Nobel Prize in Physics ⓘ |
| semiMajorAxis | about 1.95 solar radii ⓘ |
| spinDownPowered | yes ⓘ |
| testsTheory | general relativity ⓘ |
| timingPrecision | microsecond-level pulse timing measurements ⓘ |
| totalSystemMass | about 2.83 solar masses ⓘ |
| usedFor |
constraints on alternative theories of gravity
ⓘ
measurement of gravitational radiation damping ⓘ precision tests of relativistic gravity ⓘ studies of binary neutron star evolution ⓘ |
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: first binary pulsar PSR B1913+16 Description of subject: PSR B1913+16 is a landmark binary pulsar system whose precisely measured orbital decay provided the first strong indirect evidence for the existence of gravitational waves, leading to a Nobel Prize in Physics.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
first binary pulsar PSR B1913+16
linked to: first binary pulsar PSR B1913+16
subject linked to:
first binary pulsar PSR B1913+16
linked to: first binary pulsar PSR B1913+16
subject linked to:
first binary pulsar PSR B1913+16
linked to: first binary pulsar PSR B1913+16
subject linked to:
first binary pulsar PSR B1913+16
linked to: first binary pulsar PSR B1913+16
linked to: first binary pulsar PSR B1913+16
linked to: first binary pulsar PSR B1913+16
Russell Alan Hulse
→
notableWork
→
Observation of a pulsar in a binary system (1975 discovery of PSR B1913+16)
ⓘ
linked to: first binary pulsar PSR B1913+16
linked to: first binary pulsar PSR B1913+16
linked to: first binary pulsar PSR B1913+16