OGLE-II
E227958
OGLE-II is the second phase of the Optical Gravitational Lensing Experiment, a large-scale astronomical survey focused on detecting microlensing events and variable stars.
All labels observed (2)
| Label | Occurrences |
|---|---|
| OGLE-II survey | 4 |
| OGLE-II canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T2036076 — 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: OGLE-II Context triple: [OGLE, phase, OGLE-II]
-
A.
Messier 55
Messier 55 is a large, relatively loose globular star cluster located in the constellation Sagittarius, visible in small telescopes as a faint, diffuse ball of stars.
-
B.
Messier 22
Messier 22 is a bright globular star cluster located near the center of the Milky Way, visible in the constellation Sagittarius and notable for being one of the closest and most easily observed clusters of its kind.
-
C.
Messier 54
Messier 54 is a dense globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters found to belong to a dwarf galaxy outside the Milky Way.
-
D.
Leo II Dwarf Galaxy
Leo II Dwarf Galaxy is a faint, spheroidal dwarf galaxy and satellite of the Milky Way located in the constellation Leo and belonging to the Local Group of galaxies.
-
E.
Barnard's Galaxy
Barnard's Galaxy is a nearby irregular dwarf galaxy in the Local Group, notable for its low metallicity and active star formation.
- 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: OGLE-II Target entity description: OGLE-II is the second phase of the Optical Gravitational Lensing Experiment, a large-scale astronomical survey focused on detecting microlensing events and variable stars.
-
A.
Messier 55
Messier 55 is a large, relatively loose globular star cluster located in the constellation Sagittarius, visible in small telescopes as a faint, diffuse ball of stars.
-
B.
Messier 22
Messier 22 is a bright globular star cluster located near the center of the Milky Way, visible in the constellation Sagittarius and notable for being one of the closest and most easily observed clusters of its kind.
-
C.
Messier 54
Messier 54 is a dense globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters found to belong to a dwarf galaxy outside the Milky Way.
-
D.
Leo II Dwarf Galaxy
Leo II Dwarf Galaxy is a faint, spheroidal dwarf galaxy and satellite of the Milky Way located in the constellation Leo and belonging to the Local Group of galaxies.
-
E.
Barnard's Galaxy
Barnard's Galaxy is a nearby irregular dwarf galaxy in the Local Group, notable for its low metallicity and active star formation.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical survey
ⓘ
phase of the Optical Gravitational Lensing Experiment ⓘ |
| basedAt | Las Campanas Observatory ⓘ |
| contributedTo |
constraints on dark matter in the Galactic halo
ⓘ
discovery of many variable stars ⓘ discovery of numerous microlensing events ⓘ distance scale studies using variable stars ⓘ studies of the structure of the Galactic bulge ⓘ |
| countryOfOperator | Poland ⓘ |
| dataAccessibleAt |
OGLE project archives
ⓘ
linked to:
OGLE
|
| dataProduct |
microlensing event catalogs
ⓘ
photometric light curves ⓘ variable star catalogs ⓘ |
| endTime | 2000 ⓘ |
| field | astronomy ⓘ |
| followedBy | OGLE-III ⓘ |
| goal |
detection of gravitational microlensing events
ⓘ
search for variable stars ⓘ study of Galactic structure ⓘ study of the Magellanic Clouds ⓘ |
| hasFeature |
high-cadence observations
ⓘ
large-area sky coverage ⓘ long-term monitoring ⓘ |
| hasPredecessor |
OGLE-I
ⓘ
linked to:
OGLE-I survey
|
| hasSuccessor | OGLE-III ⓘ |
| locatedIn | Chile ⓘ |
| namedAfter |
Optical Gravitational Lensing Experiment
ⓘ
linked to:
OGLE-I survey
|
| observes |
Galactic bulge
ⓘ
linked to:
Milky Way center
Magellanic Clouds ⓘ microlensing events ⓘ variable stars ⓘ |
| operatedBy | Warsaw University Observatory ⓘ |
| partOf |
Optical Gravitational Lensing Experiment
ⓘ
linked to:
OGLE-I survey
|
| precededBy |
OGLE-I
ⓘ
linked to:
OGLE-I survey
|
| researchArea |
Galactic structure
ⓘ
Magellanic Clouds ⓘ gravitational microlensing ⓘ variable stars ⓘ |
| startTime | 1997 ⓘ |
| surveyType | optical survey ⓘ |
| usesFilter |
I-band
ⓘ
V-band ⓘ |
| usesMethod |
photometric monitoring
ⓘ
time-domain survey ⓘ |
| usesTelescope |
1.3-m Warsaw telescope
ⓘ
linked to:
Warsaw Telescope
|
| wavelength | 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: OGLE-II Description of subject: OGLE-II is the second phase of the Optical Gravitational Lensing Experiment, a large-scale astronomical survey focused on detecting microlensing events and variable stars.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: OGLE-II
linked to: OGLE-II
linked to: OGLE-II
linked to: OGLE-II