FORS2
E176892
FORS2 is a versatile optical instrument on ESO’s Very Large Telescope used for imaging, spectroscopy, and polarimetry of faint astronomical objects.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T1567947 — 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: FORS2 Context triple: [Very Large Telescope, hasInstrument, FORS2]
-
A.
FOSL
FOSL is the stock ticker symbol for Fossil Group, an American fashion company best known for its watches, jewelry, and accessories.
-
B.
Faint Object Spectrograph
The Faint Object Spectrograph was an early-generation Hubble Space Telescope instrument designed to obtain detailed spectra of very dim astronomical objects across a wide range of wavelengths.
-
C.
FEROS spectrograph
The FEROS spectrograph is a high-resolution, fiber-fed echelle spectrograph used in optical astronomy for precise stellar spectroscopy and radial velocity measurements.
-
D.
MPG/ESO 2.2 m Telescope
The MPG/ESO 2.2 m Telescope is a 2.2-meter optical telescope operated jointly by the Max Planck Society and the European Southern Observatory, widely used for imaging and survey work in the southern sky.
-
E.
FRO
FRO is the three-letter ISO 3166-1 alpha-3 country code assigned to the Faroe Islands.
- 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: FORS2 Target entity description: FORS2 is a versatile optical instrument on ESO’s Very Large Telescope used for imaging, spectroscopy, and polarimetry of faint astronomical objects.
-
A.
FOSL
FOSL is the stock ticker symbol for Fossil Group, an American fashion company best known for its watches, jewelry, and accessories.
-
B.
Faint Object Spectrograph
The Faint Object Spectrograph was an early-generation Hubble Space Telescope instrument designed to obtain detailed spectra of very dim astronomical objects across a wide range of wavelengths.
-
C.
FEROS spectrograph
The FEROS spectrograph is a high-resolution, fiber-fed echelle spectrograph used in optical astronomy for precise stellar spectroscopy and radial velocity measurements.
-
D.
MPG/ESO 2.2 m Telescope
The MPG/ESO 2.2 m Telescope is a 2.2-meter optical telescope operated jointly by the Max Planck Society and the European Southern Observatory, widely used for imaging and survey work in the southern sky.
-
E.
FRO
FRO is the three-letter ISO 3166-1 alpha-3 country code assigned to the Faroe Islands.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical instrument
ⓘ
focal reducer and low dispersion spectrograph ⓘ optical telescope instrument ⓘ |
| commissionedIn | 1999 ⓘ |
| designedFor |
circular polarimetry
ⓘ
imaging ⓘ linear polarimetry ⓘ long-slit spectroscopy ⓘ multi-object spectroscopy ⓘ polarimetry ⓘ spectroscopy ⓘ |
| equippedWith |
Wollaston prism
ⓘ
filters ⓘ grisms ⓘ half-wave plate ⓘ multi-object spectroscopy masks ⓘ polarization optics ⓘ quarter-wave plate ⓘ slit masks ⓘ |
| fieldOfView |
approximately 4.25 × 4.25 arcminutes in high resolution imaging
ⓘ
approximately 6.8 × 6.8 arcminutes in standard resolution imaging ⓘ |
| fullName | FOcal Reducer and low dispersion Spectrograph 2 ⓘ |
| hasMode |
imaging mode
ⓘ
mask exchange unit mode ⓘ multi-object spectroscopy mode ⓘ polarimetric mode ⓘ spectroscopic mode ⓘ |
| locatedAt |
Paranal Observatory
ⓘ
Very Large Telescope ⓘ |
| locatedIn |
Atacama Desert
ⓘ
Chile ⓘ |
| mountedOn |
Antu
ⓘ
VLT Unit Telescope 1 ⓘ
linked to:
Very Large Telescope
|
| observatoryProgram | ESO VLT instrument suite ⓘ |
| operatedBy | European Southern Observatory ⓘ |
| optimizedFor | faint astronomical objects ⓘ |
| pixelScale |
0.125 arcsec per pixel in high resolution
ⓘ
0.25 arcsec per pixel in standard resolution ⓘ |
| predecessor |
FORS1
ⓘ
linked to:
FORS2
|
| replaced |
FORS1
ⓘ
linked to:
FORS2
|
| scienceUse |
cosmology
ⓘ
extragalactic astronomy ⓘ gamma-ray burst afterglows ⓘ magnetic field measurements via spectropolarimetry ⓘ planetary nebulae ⓘ stellar populations ⓘ supernova studies ⓘ transiting exoplanets ⓘ |
| telescopeAperture | 8.2-metre ⓘ |
| wavelengthCoverage | approximately 330–1100 nm ⓘ |
| 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: FORS2 Description of subject: FORS2 is a versatile optical instrument on ESO’s Very Large Telescope used for imaging, spectroscopy, and polarimetry of faint astronomical objects.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: FORS2