The Adaptive Transient Hough method for long-duration gravitational wave transients

This paper describes a new semi-coherent method to search for transient gravitational waves of intermediate duration (hours to days). We model the frequency evolution as a power law in order to search for newborn isolated neutron stars. The search uses short Fourier transforms from the output of ground-based gravitational wave detectors and applies a weighted Hough transform. We present the technical details for implementing the algorithm, its statistical properties, and a sensitivity estimate. A first example application of this method was in the search for GW170817 post-merger signals.