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Related Experiment Video

Updated: Jul 11, 2026

Setting Limits on Supersymmetry Using Simplified Models

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 16, 2013

Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run.

B P Abbott¹, R Abbott¹, T D Abbott²

¹LIGO, California Institute of Technology, Pasadena, California 91125, USA.

Physical Review Letters

|April 8, 2017

Summary

This summary is machine-generated.

Scientists searched for a cosmic gravitational-wave background using Advanced Laser Interferometer Gravitational Wave Observatory (aLIGO) data. No signal was detected, setting new limits on the background

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Area of Science:

Astrophysics and Cosmology
Gravitational-wave Astronomy

Background:

Astrophysical and cosmological sources are predicted to create a stochastic gravitational-wave background.
Recent observations suggest a higher rate and mass of coalescing binary black holes, potentially increasing the expected background loudness.

Purpose of the Study:

To search for the isotropic stochastic gravitational-wave background using data from the first observing run of the Advanced Laser Interferometer Gravitational Wave Observatory (aLIGO).
To constrain the energy density of gravitational waves and investigate implications for astrophysical models of binary black hole backgrounds.

Main Methods:

Analysis of data from the Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run.
Performing a search for the isotropic stochastic gravitational-wave background.
Constraining dimensionless energy density for flat and arbitrary power-law spectra.

Main Results:

No evidence of a stochastic gravitational-wave signal was found in the analyzed data.
The dimensionless energy density of gravitational waves is constrained to be Ω₀ < 1.7 × 10⁻⁷ (95% confidence) for a flat spectrum in the 20-86 Hz LIGO band.
This result represents a significant improvement in sensitivity, being approximately 33 times more sensitive than previous measurements.

Conclusions:

The first aLIGO observing run did not detect a stochastic gravitational-wave background.
New, stringent upper limits have been placed on the gravitational-wave energy density.
The findings provide crucial data for refining astrophysical models of compact binary coalescences.