A template-free approach for waveform extraction of gravitational wave events

TL;DR

This paper introduces a novel, data-driven, template-free method for extracting gravitational wave event waveforms from noisy data, successfully applied to LIGO observations, enabling precise timing analysis.

Contribution

The paper presents a new general approach for waveform extraction that does not rely on templates, improving analysis of gravitational wave signals in noisy environments.

Findings

Successfully extracted waveforms from multiple LIGO observation runs

Provided accurate physical time delays between detector signals

Demonstrated effectiveness without using predefined templates

Abstract

We develop a general data-driven and template-free method for the extraction of event waveforms in the presence of background noise. Recent gravitational-wave observations provide one of the significant scientific areas requiring data analysis and waveform extraction capability. We use our method to find the waveforms for the reported events from the first, second, and third LIGO observation runs (O1, O2, and O3). Using the instantaneous frequencies derived by the Hilbert transform of the extracted waveforms, we provide the physical time delays between the arrivals of gravitational waves to the detectors.