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LIGO Livingston Observatory

node · earth

The second American laser interferometer, in Livingston Parish, Louisiana, with the same four-kilometre arm length as Hanford and roughly three thousand kilometres away from it. The separation is the point: it sets the maximum possible arrival-time difference between the two sites at about ten milliseconds, so a coincident signal with a plausible delay is far harder to produce by chance than a single-detector transient. Livingston registered the first confirmed gravitational-wave signal a few milliseconds before Hanford on 14 September 2015. Its local environment is noisier than Hanford's - the site sits in a working forestry landscape - and much of the engineering effort at both observatories goes into isolating mirrors from ground motion by many orders of magnitude.

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Assembled from 18 blocks · 1 evidence · 16 related

  1. Story
  2. The second American laser interferometer, in Livingston Parish, Louisiana, with the same four-kilometre arm length as Hanford and roughly three thousand kilometres away from it. The separation is the point: it sets the maximum possible arrival-time difference between the two sites at about ten milliseconds, so a coincident signal with a plausible delay is far harder to produce by chance than a single-detector transient. Livingston registered the first confirmed gravitational-wave signal a few milliseconds before Hanford on 14 September 2015. Its local environment is noisier than Hanford's - the site sits in a working forestry landscape - and much of the engineering effort at both observatories goes into isolating mirrors from ground motion by many orders of magnitude.
  3. Knowledge
  4. LIGO Livingston Observatory
  5. GW150914 - two black holes merge and the signal reaches Earth
  6. Connections
  7. GW150914 - two black holes merge and the signal reaches Earth
  8. GW150914 - two black holes merge and the signal reaches Earth
  9. LIGO Hanford Observatory
  10. LIGO Livingston Observatory
  11. The no-hair result
  12. Stellar-mass black hole
  13. Gravitational waves
  14. LIGO Hanford Observatory
  15. LIGO Livingston Observatory
  16. The event horizon
  17. Evidence
  18. The first direct detection of gravitational waves, from the merger of two black holes on 14 September 2015. V55 VERIFICATION BASIS: not consulted in session; WebFetch to www.ligo.org and every other host was refused by the egress proxy. Volume and article number are from recall of a canonical citation; component masses and distance quoted in this pack are recalled central values with uncertainties omitted.
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/atlas?object=SITE_LIGO_LIVINGSTON&experience=SITE_LIGO_LIVINGSTON