Scorpius X-1
E472725
Scorpius X-1 is a bright low-mass X-ray binary system and one of the strongest persistent X-ray sources in the sky, located in the constellation Scorpius.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Scorpius X-1 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4835416 — 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: Scorpius X-1 Context triple: [Scorpius, containsXRaySource, Scorpius X-1]
-
A.
Baade X
Baade X is a minor lunar impact crater located near the larger crater Baade on the Moon’s far side.
-
B.
Eta Carinae
Eta Carinae is a highly luminous and unstable massive stellar system in the constellation Carina, famous for its 19th-century "Great Eruption" and its surrounding Homunculus Nebula.
-
C.
Schwarzschild X
Schwarzschild X is a designated satellite crater of the larger lunar impact feature Schwarzschild on the far side of the Moon.
-
D.
V Coronae Australis
V Coronae Australis is a variable star located in the southern constellation Corona Australis.
-
E.
Crab Nebula
The Crab Nebula is a famous supernova remnant and pulsar wind nebula in the constellation Taurus, formed by a stellar explosion observed on Earth in 1054 AD.
- 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: Scorpius X-1 Target entity description: Scorpius X-1 is a bright low-mass X-ray binary system and one of the strongest persistent X-ray sources in the sky, located in the constellation Scorpius.
-
A.
Baade X
Baade X is a minor lunar impact crater located near the larger crater Baade on the Moon’s far side.
-
B.
Eta Carinae
Eta Carinae is a highly luminous and unstable massive stellar system in the constellation Carina, famous for its 19th-century "Great Eruption" and its surrounding Homunculus Nebula.
-
C.
Schwarzschild X
Schwarzschild X is a designated satellite crater of the larger lunar impact feature Schwarzschild on the far side of the Moon.
-
D.
V Coronae Australis
V Coronae Australis is a variable star located in the southern constellation Corona Australis.
-
E.
Crab Nebula
The Crab Nebula is a famous supernova remnant and pulsar wind nebula in the constellation Taurus, formed by a stellar explosion observed on Earth in 1054 AD.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
X-ray source
ⓘ
astronomical object ⓘ low-mass X-ray binary ⓘ |
| accretionDisk | present ⓘ |
| apparentMagnitudeV | about 12.3 ⓘ |
| belongsToClass | Z-source LMXB ⓘ |
| catalogDesignation |
4U 1617−15
NERFINISHED
ⓘ
GX 348+16 NERFINISHED ⓘ Sco X-1 NERFINISHED ⓘ |
| compactObject | neutron star ⓘ |
| compactObjectMass | about 1.4 solar masses ⓘ |
| constellation | Scorpius NERFINISHED ⓘ |
| declination | −15° 38′ 25″ ⓘ |
| discoveredBy |
Bruno Rossi
NERFINISHED
ⓘ
Frank R. Paolini NERFINISHED ⓘ Herbert Gursky NERFINISHED ⓘ Riccardo Giacconi NERFINISHED ⓘ |
| discoveryMethod | sounding rocket X-ray experiment ⓘ |
| discoveryYear | 1962 ⓘ |
| distanceFromEarth |
about 2.8 kiloparsecs
ⓘ
about 9,000 light-years ⓘ |
| emissionMechanism | accretion onto neutron star ⓘ |
| GalacticLatitude | +23.18° ⓘ |
| GalacticLongitude | 359.09° ⓘ |
| GalacticPopulation | Galactic halo object ⓘ |
| hostGalaxy | Milky Way NERFINISHED ⓘ |
| locatedInConstellation | Scorpius NERFINISHED ⓘ |
| massTransferMechanism | Roche lobe overflow ⓘ |
| notableAs |
brightest persistent extrasolar X-ray source in the sky
ⓘ
first extrasolar X-ray source discovered ⓘ |
| opticalCompanionMass | about 0.4 solar masses ⓘ |
| opticalCounterpartDesignation | V818 Scorpii NERFINISHED ⓘ |
| opticalVariability | present ⓘ |
| orbitalPeriod |
0.787 days
ⓘ
about 18.9 hours ⓘ |
| properMotion | high ⓘ |
| radialVelocity | large ⓘ |
| radioEmission | detected ⓘ |
| radioJets | present ⓘ |
| rightAscension | 16h 19m 55.1s ⓘ |
| spectralTypeOpticalCompanion | K-type subgiant ⓘ |
| systemType | low-mass X-ray binary (LMXB) ⓘ |
| usedFor |
studies of accretion physics
ⓘ
tests of general relativity in strong gravity regime ⓘ |
| variabilityType | X-ray variable source ⓘ |
| XrayBand |
hard X-rays
ⓘ
soft X-rays ⓘ |
| XrayLuminosity |
about 2×10^38 erg/s
ⓘ
of order Eddington luminosity for a neutron star ⓘ |
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: Scorpius X-1 Description of subject: Scorpius X-1 is a bright low-mass X-ray binary system and one of the strongest persistent X-ray sources in the sky, located in the constellation Scorpius.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.