This paper describes a new semi-coherent method to search for transient gravitational waves of intermediate duration (hours to days). In order to search for newborn isolated neutron stars with their possibly very rapid spin-down, we model the frequency evolution as a power law. The search uses short Fourier transforms from the output of ground-based gravitational wave detectors and applies a weighted Hough transform, also taking into account the signal's amplitude evolution. 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, and we verify the estimated sensitivity with simulated signals for this case.
@article{arxiv.1901.01820,
title = {The Adaptive Transient Hough method for long-duration gravitational wave transients},
author = {Miquel Oliver and David Keitel and Alicia M. Sintes},
journal= {arXiv preprint arXiv:1901.01820},
year = {2019}
}