Dark Energy Spectroscopic Instrument
E374970
The Dark Energy Spectroscopic Instrument (DESI) is a state-of-the-art astronomical survey instrument designed to map the large-scale structure of the universe by measuring the spectra and redshifts of millions of galaxies and quasars to study dark energy.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Dark Energy Spectroscopic Instrument canonical | 2 |
| DESI | 1 |
| DESI Collaboration | 1 |
| Dark Energy Spectroscopic Instrument Legacy Imaging Surveys | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3628703 — 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: Dark Energy Spectroscopic Instrument Context triple: [Dark Energy Survey, relatedProject, Dark Energy Spectroscopic Instrument]
-
A.
Dark Energy Camera
The Dark Energy Camera is a powerful wide-field astronomical imaging instrument designed to study dark energy and map the large-scale structure of the universe.
-
B.
Dark Energy Survey
The Dark Energy Survey is a large international astronomical project that uses a wide-field camera on a Chilean telescope to map hundreds of millions of galaxies and study the nature of dark energy and cosmic acceleration.
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C.
Vera C. Rubin Observatory
The Vera C. Rubin Observatory is a next-generation astronomical facility in Chile designed to conduct the Legacy Survey of Space and Time, producing an unprecedented, deep, wide, and fast imaging survey of the night sky.
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D.
LSST Camera
The LSST Camera is a massive, wide-field digital camera designed to capture deep, high-resolution images of the night sky for the Vera C. Rubin Observatory’s decade-long sky survey.
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E.
Giant Magellan Telescope
The Giant Magellan Telescope is a next-generation, extremely large ground-based optical and infrared telescope designed to achieve unprecedented resolution for astronomical observations.
- 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: Dark Energy Spectroscopic Instrument Target entity description: The Dark Energy Spectroscopic Instrument (DESI) is a state-of-the-art astronomical survey instrument designed to map the large-scale structure of the universe by measuring the spectra and redshifts of millions of galaxies and quasars to study dark energy.
-
A.
Dark Energy Camera
The Dark Energy Camera is a powerful wide-field astronomical imaging instrument designed to study dark energy and map the large-scale structure of the universe.
-
B.
Dark Energy Survey
The Dark Energy Survey is a large international astronomical project that uses a wide-field camera on a Chilean telescope to map hundreds of millions of galaxies and study the nature of dark energy and cosmic acceleration.
-
C.
Vera C. Rubin Observatory
The Vera C. Rubin Observatory is a next-generation astronomical facility in Chile designed to conduct the Legacy Survey of Space and Time, producing an unprecedented, deep, wide, and fast imaging survey of the night sky.
-
D.
LSST Camera
The LSST Camera is a massive, wide-field digital camera designed to capture deep, high-resolution images of the night sky for the Vera C. Rubin Observatory’s decade-long sky survey.
-
E.
Giant Magellan Telescope
The Giant Magellan Telescope is a next-generation, extremely large ground-based optical and infrared telescope designed to achieve unprecedented resolution for astronomical observations.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical survey instrument
ⓘ
cosmology experiment ⓘ dark energy experiment ⓘ spectroscopic instrument ⓘ |
| acronym |
Dark Energy Spectroscopic Instrument
self-linksurface differs
ⓘ
surface form:
DESI
|
| collaborationSize | hundreds of scientists ⓘ |
| constructionStartDate | 2015 ⓘ |
| fieldOfView | 3.2 degrees diameter ⓘ |
| firstLightDate | 2019 ⓘ |
| fundedBy |
National Science Foundation
ⓘ
U.S. Department of Energy ⓘ international partners ⓘ |
| hasComponent |
CCD detectors
ⓘ
fiber cables ⓘ prime focus corrector ⓘ robotic fiber positioners ⓘ spectrographs ⓘ |
| hostTelescope | Nicholas U. Mayall Telescope ⓘ |
| locatedAt |
Kitt Peak National Observatory
ⓘ
NOIRLab ⓘ
surface form:
NOIRLab facility
|
| locatedIn |
Arizona
ⓘ
United States of America ⓘ
surface form:
United States
|
| mountedOn | Mayall 4-meter Telescope ⓘ |
| numberOfFibers | 5000 ⓘ |
| numberOfSpectrographs | 10 ⓘ |
| operatedBy |
Dark Energy Spectroscopic Instrument
self-linksurface differs
ⓘ
surface form:
DESI Collaboration
|
| plannedSurveyDuration | 5 years ⓘ |
| primaryScienceGoal | study dark energy ⓘ |
| relatedTo |
Sloan Digital Sky Survey
ⓘ
surface form:
Baryon Oscillation Spectroscopic Survey
Dark Energy Survey ⓘ Sloan Digital Sky Survey ⓘ |
| scienceGoal |
constrain dark energy equation of state
ⓘ
map large-scale structure of the universe ⓘ measure baryon acoustic oscillations ⓘ measure expansion history of the universe ⓘ measure redshifts of galaxies ⓘ measure redshifts of quasars ⓘ study neutrino mass constraints ⓘ test models of modified gravity ⓘ |
| spectralResolution | R ~ 2000–5000 ⓘ |
| surveyArea | approximately 14000 square degrees ⓘ |
| surveyStartDate | 2021 ⓘ |
| targetNumberOfGalaxiesAndQuasars | tens of millions ⓘ |
| targetNumberOfObjects | about 35 million ⓘ |
| targetRedshiftRange | up to redshift 3.5 ⓘ |
| usesMethod |
fiber-fed spectroscopy
ⓘ
multi-object spectroscopy ⓘ |
| wavelengthRange | optical ⓘ |
| website | https://www.desi.lbl.gov/ ⓘ |
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: Dark Energy Spectroscopic Instrument Description of subject: The Dark Energy Spectroscopic Instrument (DESI) is a state-of-the-art astronomical survey instrument designed to map the large-scale structure of the universe by measuring the spectra and redshifts of millions of galaxies and quasars to study dark energy.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
Dark Energy Spectroscopic Instrument
→
acronym
→
Dark Energy Spectroscopic Instrument
self-linksurface differs
ⓘ
this entity surface form:
DESI
Dark Energy Spectroscopic Instrument
→
operatedBy
→
Dark Energy Spectroscopic Instrument
self-linksurface differs
ⓘ
this entity surface form:
DESI Collaboration
this entity surface form:
Dark Energy Spectroscopic Instrument Legacy Imaging Surveys