Obtaining Statistical Significance of Gravitational Wave Signals in Hierarchical Search

Understand

Gravitational Wave (GW) astronomy has experienced remarkable growth in recent years, driven by advancements in ground-based detectors.

• While detecting compact binary coalescences (CBCs) has become routine, searching for more complex ones, such as mergers involving eccentric and precessing binaries and sub-solar mass binaries, has presented persistent challenges.
• These challenges arise from using the standard matched filtering algorithm, whose computational cost increases with the dimensionality and size of the template bank.
• This urges the pressing need for faster search pipelines to efficiently identify GW signals, leading to the emergence of the hierarchical search strategy.