MegaCam
E435727
MegaCam is a wide-field optical imaging camera used for deep-sky astronomical surveys on the Canada–France–Hawaii Telescope.
All labels observed (2)
| Label | Occurrences |
|---|---|
| MegaCam canonical | 3 |
| MegaCam wide-field imager | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4378604 — 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: MegaCam Context triple: [Canada–France–Hawaii Telescope, hasInstrument, MegaCam]
-
A.
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.
-
B.
Inamori Magellan Areal Camera and Spectrograph
The Inamori Magellan Areal Camera and Spectrograph (IMACS) is a wide-field optical imaging and spectrographic instrument mounted on the Magellan telescopes, used for deep astronomical surveys and detailed spectroscopic studies.
-
C.
Curtis Schmidt Telescope
The Curtis Schmidt Telescope is a wide-field Schmidt telescope known for its photographic sky surveys and operation at the Cerro Tololo Inter-American Observatory in Chile.
-
D.
Víctor M. Blanco 4-meter Telescope
The Víctor M. Blanco 4-meter Telescope is a prominent optical telescope in Chile widely used for deep-sky surveys and cosmological research.
-
E.
VISTA telescope
The VISTA telescope is a 4.1-meter wide-field survey telescope in Chile designed primarily for large-scale near-infrared sky surveys.
- 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: MegaCam Target entity description: MegaCam is a wide-field optical imaging camera used for deep-sky astronomical surveys on the Canada–France–Hawaii Telescope.
-
A.
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.
-
B.
Inamori Magellan Areal Camera and Spectrograph
The Inamori Magellan Areal Camera and Spectrograph (IMACS) is a wide-field optical imaging and spectrographic instrument mounted on the Magellan telescopes, used for deep astronomical surveys and detailed spectroscopic studies.
-
C.
Curtis Schmidt Telescope
The Curtis Schmidt Telescope is a wide-field Schmidt telescope known for its photographic sky surveys and operation at the Cerro Tololo Inter-American Observatory in Chile.
-
D.
Víctor M. Blanco 4-meter Telescope
The Víctor M. Blanco 4-meter Telescope is a prominent optical telescope in Chile widely used for deep-sky surveys and cosmological research.
-
E.
VISTA telescope
The VISTA telescope is a 4.1-meter wide-field survey telescope in Chile designed primarily for large-scale near-infrared sky surveys.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical instrument
ⓘ
telescope camera ⓘ wide-field optical imaging camera ⓘ |
| associatedSurvey |
CFHT Legacy Survey
ⓘ
CFHTLS Deep ⓘ CFHTLS Very Wide ⓘ CFHTLS Wide ⓘ |
| collaboratingCountries |
Canada
ⓘ
France ⓘ United States ⓘ
linked to:
United States of America
|
| commissionedBy |
Canada–France–Hawaii Telescope collaboration
ⓘ
linked to:
Canada–France–Hawaii Telescope
|
| country |
United States
ⓘ
linked to:
United States of America
|
| dataProduct |
deep multi-band imaging catalogs
ⓘ
wide-field optical images ⓘ |
| detectorType | CCD mosaic ⓘ |
| enables |
large-area sky surveys
ⓘ
precision photometry over wide fields ⓘ weak lensing shape measurements ⓘ |
| fieldOfView | approximately 1 square degree ⓘ |
| filterSystem | u* g' r' i' z' filters (Sloan-like) ⓘ |
| hostTelescope |
CFHT
ⓘ
linked to:
Canada–France–Hawaii Telescope
|
| locatedAt | Canada–France–Hawaii Telescope ⓘ |
| mounting | prime focus of the Canada–France–Hawaii Telescope ⓘ |
| observatoryLocation |
Hawaii
ⓘ
Mauna Kea Observatory ⓘ
linked to:
Mauna Kea Observatories
|
| operator |
Canada–France–Hawaii Telescope Corporation
ⓘ
linked to:
Canada–France–Hawaii Telescope
|
| pixelCount | over 300 million pixels ⓘ |
| primaryUse |
deep-sky astronomical surveys
ⓘ
wide-field imaging ⓘ |
| scienceFocus |
cosmology
ⓘ
dark energy constraints ⓘ dark matter studies ⓘ galactic archaeology ⓘ transient object discovery ⓘ |
| sciencePrograms |
Milky Way structure studies
ⓘ
galaxy evolution studies ⓘ large-scale structure mapping ⓘ stellar populations in nearby galaxies ⓘ supernova searches ⓘ weak gravitational lensing surveys ⓘ |
| supports | queue-scheduled observing ⓘ |
| telescopeAperture | 3.6 metres ⓘ |
| telescopeType | 3.6-m optical-infrared telescope ⓘ |
| usedOn | Canada–France–Hawaii Telescope ⓘ |
| wavelengthRange | optical ⓘ |
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: MegaCam Description of subject: MegaCam is a wide-field optical imaging camera used for deep-sky astronomical surveys on the Canada–France–Hawaii Telescope.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: MegaCam