The Rapid Iterative FiTting (RIFT) parameter inference algorithm provides a framework for efficient, highly-parallelized parameter inference for GW sources. In this paper, we summarize essential algorithm enhancements and operating point choices for the RIFT iterative algorithm, including choices used for analysis of LIGO/Virgo O3 observations. We also describe other extensions to the RIFT algorithm and software ecosystem. Some extensions increase RIFT's flexibility to produce outputs pertinent to GW astrophysics. Other extensions increase its computational efficiency or stability. Using many randomly-selected sources, we assess code robustness with two distinct code configurations, one designed to mimic settings as of LIGO O3 and another employing several performance enhancements. We illustrate RIFT's capabilities with analysis of selected events.
@article{arxiv.2210.07912,
title = {Expanding RIFT: Improving performance for GW parameter inference},
author = {J. Wofford and A. Yelikar and H. Gallagher and E. Champion and D. Wysocki and V. Delfavero and J. Lange and C. Rose and V. Valsan and S. Morisaki and J. Read and C. Henshaw and R. O'Shaughnessy},
journal= {arXiv preprint arXiv:2210.07912},
year = {2023}
}
Comments
v2: accepted/published in PRD; includes feedback in response to referee