Papers › GWtuna: Trawling through the data to find Gravitational Waves with Optuna and Jax
GWtuna: Trawling through the data to find Gravitational Waves with Optuna and Jax
Susanna Green, Andrew Lundgren
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GWtuna is a fast gravitational-wave search prototype built on Optuna (optimisation software library) and JAX (accelerator-orientated array computation library) [1, 2]. Using Optuna, we introduce black box optimisation algorithms and evolutionary strategy algorithms to the gravitational-wave community. Tree-structured Parzen Estimator (TPE) and Covariance Matrix Adaption Evolution Strategy (CMA-ES) have been used to create the first template bank free search and used to identify binary neutron star mergers. TPE can identify a binary neutron star merger in 1 second (median value) and less than 1000 matched-filter evaluations when 512 seconds of data is searched over. A stopping algorithm is used to curtail the TPE search if the signal-to-noise ratio (SNR) threshold has been reached, or the SNR has not improved in 500 evaluations. If the SNR threshold is surpassed, CMA-ES is used to recover the SNR and the template parameters in 9,000 matched filter iterations taking 48 seconds (median value). GWtuna showcases alternatives to the standard template bank search and therefore has the potential to revolutionise the future of gravitational-wave data analysis.
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