Long-duration transient gravitational-wave search pipeline

A. Macquet, M. A. Bizouard, N. Christensen, M. Coughlin

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


As the sensitivity and observing time of gravitational-wave detectors increase, a more diverse range of signals is expected to be observed from a variety of sources. Especially, long-lived gravitational-wave transients have received interest in the last decade. Because most long-duration signals are poorly modeled, detection must rely on generic search algorithms, which make few or no assumptions on the nature of the signal. However, the computational cost of those searches remains a limiting factor, which leads to suboptimal sensitivity. Several detection algorithms have been developed to cope with this issue. In this paper, we present a new data analysis pipeline to search for unmodeled long-lived transient gravitational-wave signals with duration between 10 and 103 s, based on an excess cross-power statistic in a network of detectors. The pipeline implements several new features that are intended to reduce computational cost and increase detection sensitivity for a wide range of signal morphologies. The method is generalized to a network of an arbitrary number of detectors and aims to provide a stable interface for further improvements. Comparisons with a previous implementation of a similar method on simulated and real gravitational-wave data show an overall increase in detection efficiency for all but one signal morphologies tested and a computing time reduced by at least a factor 10.

Original languageEnglish (US)
Article number102005
JournalPhysical Review D
Issue number10
StatePublished - Nov 15 2021

Bibliographical note

Funding Information:
N. C. is supported by NSF Grant No. PHY-1806990. M. C. is supported by NSF Grants No. PHY-2010970 and No. OAC-2117997. This research has made use of data, software, and/or web tools obtained from the Gravitational Wave Open Science Center ( https://www.gw-openscience.org/ ), a service of LIGO Laboratory, the LIGO Scientific Collaboration, and the Virgo Collaboration. LIGO Laboratory and Advanced LIGO are funded by the U.S. National Science Foundation (NSF) as well as the Science and Technology Facilities Council (STFC) of the United Kingdom, the Max-Planck-Society (MPS), and the State of Niedersachsen/Germany for support of the construction of Advanced LIGO and construction and operation of the GEO600 detector. Additional support for Advanced LIGO was provided by the Australian Research Council. Virgo is funded, through the European Gravitational Observatory (EGO), by the French Centre National de Recherche Scientifique (CNRS), the Italian Istituto Nazionale di Fisica Nucleare (INFN), and the Dutch Nikhef, with contributions by institutions from Belgium, Germany, Greece, Hungary, Ireland, Japan, Monaco, Poland, Portugal, and Spain . The authors are grateful for computational resources provided by the LIGO Laboratory and supported by National Science Foundation Grants No. PHY-0757058 and No. PHY-0823459.

Publisher Copyright:
© 2021 American Physical Society.


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