A rapid method for preliminary identification of subthreshold strongly lensed counterparts to superthreshold gravitational-wave events

Understand

Gravitational waves (GWs) from stellar-mass compact binary coalescences (CBCs) are expected to be strongly lensed when encountering large agglomerations of matter, such as galaxies or clusters.

• Searches for strongly lensed GWs have been conducted using data from the first three observing runs of the LIGO-Virgo GW detector network.
• Although no confirmed detections have been reported, interesting candidate lensed pairs have been identified.
• In this work, we delineate a preliminary analysis that rapidly identifies pairs to be further analyzed by more sophisticated Bayesian parameter estimation (PE) methods.