Expanding RIFT: Improving performance for GW parameter inference

1); 2); (2) University of Wisconsin-Milwaukee; (3) Institute for Cosmic Ray Research; (4) California State University Fullerton; (5) Georgia Institute of Technology); A. Yelikar (1); C. Henshaw (6); C. Rose (2); D. Wysocki (1

Expanding RIFT: Improving performance for GW parameter inference

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arxiv 2210.07912 v2 pith:KQERLZKI submitted 2022-10-14 gr-qc astro-ph.IM

J. Wofford (1) , A. Yelikar (1) , H. Gallagher (1) , E. Champion (1) , D. Wysocki (1 , 2) , V. Delfavero (1) , J. Lange (3

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1) C. Rose (2) V. Valsan (2) S. Morisaki (4and 2) J. Read (5) C. Henshaw (6) R. O'Shaughnessy (1) ( (1) Rochester Institute of Technology (2) University of Wisconsin-Milwaukee (3) Institute for Cosmic Ray Research The University of Tokyo (4) California State University Fullerton (5) Georgia Institute of Technology)

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classification gr-qcastro-ph.IM

keywords riftalgorithmextensionsinferenceparameteranalysischoicescode

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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.

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