O2
E730524
O2 is the second observing run of the LIGO–Virgo gravitational-wave detectors, during which multiple gravitational-wave events from compact binary mergers were detected.
All labels observed (1)
| Label | Occurrences |
|---|---|
| O2 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8396810 — 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: O2 Context triple: [Virgo Collaboration, dataTakingRun, O2]
-
A.
O2
O2 is a major UK mobile network operator and telecommunications services provider owned by Telefónica.
-
B.
Oxygen
Oxygen is an American television network primarily known for its true-crime and reality programming, targeting a female-oriented audience.
-
C.
Oxygène
Oxygène is a landmark 1976 electronic music album by French composer Jean-Michel Jarre, renowned for its atmospheric synthesizer soundscapes and major influence on the genre.
-
D.
Oxy
Oxy is the commonly used nickname for Occidental College, a private liberal arts college in Los Angeles, California.
-
E.
O.
O. is the middle initial of Mark O. Hatfield, the long-serving U.S. Senator and former Governor of Oregon.
- 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: O2 Target entity description: O2 is the second observing run of the LIGO–Virgo gravitational-wave detectors, during which multiple gravitational-wave events from compact binary mergers were detected.
-
A.
O2
O2 is a major UK mobile network operator and telecommunications services provider owned by Telefónica.
-
B.
Oxygen
Oxygen is an American television network primarily known for its true-crime and reality programming, targeting a female-oriented audience.
-
C.
Oxygène
Oxygène is a landmark 1976 electronic music album by French composer Jean-Michel Jarre, renowned for its atmospheric synthesizer soundscapes and major influence on the genre.
-
D.
Oxy
Oxy is the commonly used nickname for Occidental College, a private liberal arts college in Los Angeles, California.
-
E.
O.
O. is the middle initial of Mark O. Hatfield, the long-serving U.S. Senator and former Governor of Oregon.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
LIGO–Virgo observing run
ⓘ
observing run ⓘ |
| aim |
detection of gravitational waves from compact binary mergers
ⓘ
improvement of detector sensitivity over O1 ⓘ |
| alternateName | LIGO–Virgo O2 observing run ⓘ |
| collaboration |
LIGO Scientific Collaboration and Virgo Collaboration
ⓘ
linked to:
LIGO Scientific Collaboration
|
| dataRelease |
GWTC-1 catalog
ⓘ
subsequent reanalyses with additional candidate events ⓘ |
| detects |
binary black hole mergers
ⓘ
binary neutron star merger GW170817 ⓘ
linked to:
GW170817
|
| duration | approximately 9 months ⓘ |
| endDate | 2017-08-25 ⓘ |
| feature | first observing run including Advanced Virgo for part of the run ⓘ |
| followedByUpgrade | detector improvements leading to O3 sensitivity ⓘ |
| follows | O1 ⓘ |
| hasEvent |
GW151226 reanalysis and additional events reported in O2 catalogs
ⓘ
GW170104 ⓘ GW170608 ⓘ GW170814 ⓘ GW170817 ⓘ |
| location |
Cascina, Italy
ⓘ
Hanford, Washington, United States ⓘ
linked to:
Hanford Site, Washington
Livingston, Louisiana, United States ⓘ
linked to:
Livingston, Louisiana
|
| notableFor |
first detection of a binary neutron star merger
ⓘ
first multi-messenger observation of a gravitational-wave source ⓘ first three-detector gravitational-wave observation (GW170814) ⓘ
linked to:
GW170814
|
| operatedBy |
LIGO Scientific Collaboration
ⓘ
Virgo Collaboration ⓘ |
| partOf |
Advanced LIGO era
ⓘ
LIGO–Virgo Collaboration observing program ⓘ
linked to:
LIGO–Virgo O2 observing run
|
| precededByUpgrade | Advanced LIGO detector commissioning ⓘ |
| precedes | O3 ⓘ |
| publication |
GW170817 discovery paper
ⓘ
linked to:
GW170817
LIGO–Virgo GWTC-1 catalog paper ⓘ
linked to:
GWTC-1 gravitational-wave transient catalog
|
| result |
constraints on the speed of gravity from GW170817 and its electromagnetic counterpart
ⓘ
improved constraints on compact binary merger rates ⓘ measurement of Hubble constant using GW170817 as a standard siren ⓘ tests of general relativity in the strong-field regime ⓘ |
| scientificDiscipline |
astrophysics
ⓘ
gravitational-wave astronomy ⓘ |
| startDate | 2016-11-30 ⓘ |
| temporalContext |
Advanced LIGO second observing run
ⓘ
linked to:
LIGO–Virgo O2 observing run
|
| usesDetector |
Advanced LIGO Hanford Observatory
ⓘ
Advanced LIGO Livingston Observatory ⓘ Advanced Virgo detector ⓘ
linked to:
Advanced Virgo
|
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: O2 Description of subject: O2 is the second observing run of the LIGO–Virgo gravitational-wave detectors, during which multiple gravitational-wave events from compact binary mergers were detected.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.