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Virgo interferometer

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description Virgo interferometer Overview

The Virgo interferometer is an Italian observatory contributing to global efforts in gravitational wave astronomy. It’s one of two ground-based observatories alongside LIGO, utilizing laser interferometry to detect tiny distortions in spacetime caused by cataclysmic events like black hole mergers and neutron star collisions. This collaboration enhances the precision and geographic coverage needed to pinpoint these signals and advance our understanding of the universe. The Virgo interferometer is primarily used by scientists and research institutions focused on astrophysics and cosmology.

help Virgo interferometer FAQ

Where is the Virgo interferometer located and how big are its arms?

The Virgo interferometer is located near Cascina, close to Pisa in Italy, and is operated by a European collaboration of over 500 scientists. Its detector arms each extend 3 kilometers, slightly shorter than LIGO's 4-kilometer arms in the United States.

When did Virgo make its first gravitational wave detection?

Virgo made its first gravitational wave detection on August 14, 2017, in the event designated GW170814, which was a binary black hole merger detected jointly with both LIGO detectors. This was the first event observed by all three interferometers operating simultaneously, greatly improving the sky localization of the source.

How do Virgo and LIGO work together to detect gravitational waves?

Virgo and the two LIGO detectors in the United States operate as a coordinated network, and when all three detect the same signal, the timing differences allow scientists to triangulate the source position on the sky. The addition of Virgo to the LIGO network in 2017 reduced the typical sky localization area by roughly an order of magnitude compared to LIGO alone.

What upgrades has the Virgo interferometer received?

Virgo underwent a major upgrade program called Advanced Virgo, which brought its sensitivity to a level comparable with Advanced LIGO, and it joined LIGO's second observing run (O2) in August 2017. Further improvements under the Advanced Virgo+ program were implemented between subsequent observing runs to increase detection range.

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