IXPE X-ray Polarimetry Explorer
E79021
IXPE X-ray Polarimetry Explorer is a NASA space observatory designed to measure the polarization of cosmic X-rays to study extreme astrophysical environments such as black holes, neutron stars, and supernova remnants.
All labels observed (3)
| Label | Occurrences |
|---|---|
| IXPE | 4 |
| Imaging X-ray Polarimetry Explorer | 2 |
| IXPE X-ray Polarimetry Explorer canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T633386 — 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: IXPE X-ray Polarimetry Explorer Context triple: [NASA Astrophysics Division, overseesMission, IXPE X-ray Polarimetry Explorer]
-
A.
MICROSCOPE satellite mission
The MICROSCOPE satellite mission was a French-led space experiment designed to test the validity of Einstein’s equivalence principle with unprecedented precision by comparing the free fall of different materials in orbit.
-
B.
BepiColombo mission
The BepiColombo mission is a joint ESA–JAXA spacecraft mission designed to study the planet Mercury’s composition, magnetic field, and environment through dual orbiters.
-
C.
Great Observatories program
The Great Observatories program is a NASA initiative comprising a suite of space-based telescopes operating across different regions of the electromagnetic spectrum to provide complementary views of the universe.
-
D.
James Webb Space Telescope
The James Webb Space Telescope is a large, space-based observatory designed to study the universe in infrared light, revealing the formation of the first galaxies, stars, and planetary systems with unprecedented sensitivity and resolution.
-
E.
Spitzer Space Telescope
The Spitzer Space Telescope was a NASA infrared space observatory that studied the universe in long-wavelength light, revealing cold, dusty, and distant objects invisible to optical telescopes.
- 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: IXPE X-ray Polarimetry Explorer Target entity description: IXPE X-ray Polarimetry Explorer is a NASA space observatory designed to measure the polarization of cosmic X-rays to study extreme astrophysical environments such as black holes, neutron stars, and supernova remnants.
-
A.
MICROSCOPE satellite mission
The MICROSCOPE satellite mission was a French-led space experiment designed to test the validity of Einstein’s equivalence principle with unprecedented precision by comparing the free fall of different materials in orbit.
-
B.
BepiColombo mission
The BepiColombo mission is a joint ESA–JAXA spacecraft mission designed to study the planet Mercury’s composition, magnetic field, and environment through dual orbiters.
-
C.
Great Observatories program
The Great Observatories program is a NASA initiative comprising a suite of space-based telescopes operating across different regions of the electromagnetic spectrum to provide complementary views of the universe.
-
D.
James Webb Space Telescope
The James Webb Space Telescope is a large, space-based observatory designed to study the universe in infrared light, revealing the formation of the first galaxies, stars, and planetary systems with unprecedented sensitivity and resolution.
-
E.
Spitzer Space Telescope
The Spitzer Space Telescope was a NASA infrared space observatory that studied the universe in long-wavelength light, revealing cold, dusty, and distant objects invisible to optical telescopes.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
NASA space telescope
ⓘ
X-ray astronomy mission ⓘ space observatory ⓘ |
| acronym |
IXPE X-ray Polarimetry Explorer
self-link
ⓘ
surface form:
IXPE
|
| collaboratingAgency |
Italian Space Agency
ⓘ
surface form:
Italian Space Agency ASI
|
| collaborationCountry |
Italy
ⓘ
United States of America ⓘ
surface form:
United States
|
| energyRange | 2–8 keV ⓘ |
| explorerClass |
SMEX-Lite
ⓘ
surface form:
SMEX (Small Explorer)
|
| fullName |
IXPE X-ray Polarimetry Explorer
self-linksurface differs
ⓘ
surface form:
Imaging X-ray Polarimetry Explorer
|
| hasInstrument |
X-ray polarimeter
ⓘ
gas pixel detector ⓘ |
| hasTelescope | three identical X-ray telescopes ⓘ |
| launchCountry |
United States of America
ⓘ
surface form:
United States
|
| launchDate | 2021-12-09 ⓘ |
| launchProvider | SpaceX ⓘ |
| launchSite |
Kennedy Space Center Launch Complex 39A
ⓘ
surface form:
Kennedy Space Center LC-39A
|
| launchVehicle |
Falcon 9 rocket
ⓘ
surface form:
Falcon 9 Block 5
|
| manufacturer | Ball Aerospace ⓘ |
| missionType |
X-ray polarimetry mission
ⓘ
astrophysics observatory ⓘ |
| operator | NASA ⓘ |
| orbitCharacteristic | equatorial orbit ⓘ |
| orbitInclination | 0 degrees ⓘ |
| orbitType | low Earth orbit ⓘ |
| primaryObjective | measure polarization of cosmic X-rays ⓘ |
| principalInvestigator | Martin C. Weisskopf ⓘ |
| program |
NASA Astrophysics Explorers Program
ⓘ
surface form:
NASA Explorers Program
|
| scienceCapability |
imaging X-ray polarimetry
ⓘ
spectroscopy ⓘ timing studies ⓘ |
| scienceFocus |
active galactic nuclei
ⓘ
black hole accretion disks ⓘ magnetars ⓘ pulsars ⓘ supernova remnants ⓘ |
| scientificGoal |
constrain geometry and emission mechanisms of X-ray sources
ⓘ
investigate black holes ⓘ investigate neutron stars ⓘ investigate supernova remnants ⓘ study extreme astrophysical environments ⓘ |
| spaceAgency | NASA ⓘ |
| spacecraftBus |
Ball Aerospace
ⓘ
surface form:
Ball Aerospace BCP-100
|
| spaceEnvironment | extreme astrophysical environments ⓘ |
| status | operational ⓘ |
| studies |
strong gravity near black holes
ⓘ
strong magnetic fields around neutron stars ⓘ |
| telescopeCount | 3 ⓘ |
| wavelengthBand | X-ray ⓘ |
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: IXPE X-ray Polarimetry Explorer Description of subject: IXPE X-ray Polarimetry Explorer is a NASA space observatory designed to measure the polarization of cosmic X-rays to study extreme astrophysical environments such as black holes, neutron stars, and supernova remnants.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
IXPE
this entity surface form:
Imaging X-ray Polarimetry Explorer
IXPE X-ray Polarimetry Explorer
→
fullName
→
IXPE X-ray Polarimetry Explorer
self-linksurface differs
ⓘ
subject surface form:
IXPE
this entity surface form:
Imaging X-ray Polarimetry Explorer
subject surface form:
IXPE
this entity surface form:
IXPE
this entity surface form:
IXPE
this entity surface form:
IXPE