Investigation of magnetic noise in Advanced Virgo

TL;DR

This study investigates how environmental magnetic noise affects the sensitivity of Advanced Virgo, finding that magnetic noise does not impact detection capabilities up to approximately 100 Mpc in binary neutron star range.

Contribution

The paper provides a detailed analysis of magnetic noise coupling in Advanced Virgo and presents mitigation strategies based on injection studies and environmental measurements.

Findings

Magnetic noise does not affect sensitivity up to ~100 Mpc in BNS range.

Injection studies reveal the coupling mechanisms between magnetic noise and the detector.

Characterization and mitigation strategies for magnetic noise are effective.

Abstract

The Advanced Virgo (AdV) sensitivity might be influenced by the effects of environmental noise, in particular magnetic noise (MN). In order to show the impact on the gravitational-wave strain signal h(t) and on the AdV sensitivity, we must understand the coupling between the environmental magnetic activity and the strain. The relationship between the environmental noise - measured by a physical environment monitor (PEM) - and h(t) is investigated using injection studies, where an intentional stimulus is introduced and the responses of both PEM sensors and the instrument are analyzed. We also present the most outstanding measurements and results obtained from both the characterization and the mitigation studies of the environmental MN. Results show that MN does not affect AdV sensitivity up to $\approx 100$ Mpc in BNS range.