Response of the Brazilian gravitational wave detector to signals from a black hole ringdown

TL;DR

This paper evaluates the Brazilian SCHENBERG gravitational wave detector's ability to detect black hole ringdown signals, demonstrating it could observe such events up to approximately 20 kiloparsecs.

Contribution

It provides the first realistic simulation of the detector's response to black hole ringdown signals, aiding in developing analysis strategies.

Findings

SCHENBERG can detect black hole ringdown signals up to ~20 kpc.

Signal-to-noise ratio depends on frequency for these signals.

Simulation results guide future data analysis methods.

Abstract

It is assumed that a black hole can be disturbed in such a way that a ringdown gravitational wave would be generated. This ringdown waveform is well understood and is modelled as an exponentially damped sinusoid. In this work we use this kind of waveform to study the performance of the SCHENBERG gravitational wave detector. This first realistic simulation will help us to develop strategies for the signal analysis of this Brazilian detector. We calculated the signal-to-noise ratio as a function of frequency for the simulated signals and obtained results that show that SCHENBERG is expected to be sensitive enough to detect this kind of signal up to a distance of $\sim 20\mathrm{kpc}$.