Searches for Gravitational Waves from Binary Neutron Stars: A Review

Abstract

Summary.A new generation of observatories is looking for gravitational waves. These waves, emitted by highly relativistic systems, will open a new window for observation of the cosmos when they are detected. Among the most promising sources of gravitational waves for these observatories are compact binaries in the final minutes before coalescence. In this article, we review in brief interferometric searches for gravitational waves emitted by neutron star binaries, including the theory, instrumentation and methods. No detections have been made to date. However, the best direct observational limits on coalescence rates have been set, and instrumentation and analysis methods continue to be refined toward the ultimate goal of defining the new field of gravitational wave astronomy.

Convolutional neural network for gravitational-wave early alert: Going down in frequency

“…One can show that this matched filtering output still depends on the phase at a reference time of the signal, for instance at the time when it enters the frequency band of the interferometer. It is possible to minimize xðtÞ analytically with respect to that phase [35,72] and express the result via the complex zðtÞ:…”