Banagiri, S., Berry, C. P.L. , Cabourn Davies, G. S., Tsukada, L. and Doctor, Z. (2023) Unified p astro for gravitational waves: Consistently combining information from multiple search pipelines. Physical Review D, 108(8), 083043. (doi: 10.1103/PhysRevD.108.083043)
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Abstract
Recent gravitational-wave transient catalogs have used p astro, the probability that a gravitational-wave candidate is astrophysical, to select interesting candidates for further analysis. Unlike false alarm rates, which exclusively capture the statistics of the instrumental noise triggers, p astro incorporates the rate at which triggers are generated by both astrophysical signals and instrumental noise in estimating the probability that a candidate is astrophysical. Multiple search pipelines can independently calculate p astro, each employing a specific data reduction. While the range of p astro results can help indicate the range of uncertainties in its calculation, it complicates interpretation and subsequent analyses. We develop a statistical formalism to calculate a unified p astro for gravitational-wave candidates, consistently accounting for triggers from all pipelines, thereby incorporating extra information about a signal that is not available with any one single pipeline. We demonstrate the properties of this method using a toy model and by application to the publicly available list of gravitational-wave candidates from the first half of the third LIGO-Virgo-KAGRA observing run. Adopting a unified p astro for future catalogs would provide a simple and easy-to-interpret selection criterion that incorporates a more complete understanding of the strengths of the different search pipelines.
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| Additional Information: | S. .B was supported by National Science Foundation (NSF) Grant No. PHY-2207945. C. P. L. B. acknowledges support from Science and Technology Facilities Council (STFC) Grant No. ST/V005634/1. Z. D. acknowledges support from the CIERA Board of Visitors Research Professorship. L. T. is supported by the NSF through Grants No. OAC-2103662 and No. PHY2011865. G. S. C. D. acknowledges the STFC for funding through Grants No. ST/T000333/1 and No. ST/V005715/1. The authors are grateful for computational resources provided by the LIGO Laboratory and supported by NSF Grants No. PHY-0757058 and No. PHY-0823459. This material is based upon work supported by NSF’s LIGO Laboratory which is a major facility fully funded by the National Science Foundation. This research has made use of data obtained from the Gravitational Wave Open Science Center ([74]) [75], a service of LIGO Laboratory, the LIGO Scientific Collaboration, the Virgo Collaboration, and KAGRA. LIGO Laboratory and Advanced LIGO [3] are funded by the United States NSF as well as the 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 GEO 600 detector[76]. Additional support for Advanced LIGO was provided by the Australian Research Council. Virgo [4] 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, Spain. KAGRA [77] is supported by Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan Society for the Promotion of Science (JSPS) in Japan; National Research Foundation (NRF) and Ministry of Science and ICT (MSIT) in Korea; Academia Sinica (AS) and National Science and Technology Council (NSTC) in Taiwan. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Berry, Dr Christopher |
| Authors: | Banagiri, S., Berry, C. P.L., Cabourn Davies, G. S., Tsukada, L., and Doctor, Z. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Research Centre: | College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research |
| Journal Name: | Physical Review D |
| Publisher: | American Physical Society |
| ISSN: | 1550-7998 |
| ISSN (Online): | 1550-2368 |
| Published Online: | 31 October 2023 |
| Copyright Holders: | Copyright: © 2023 American Physical Society |
| First Published: | First published in Physical Review D 108(8): 083043 |
| Publisher Policy: | Reproduced under a Creative Commons licence |
| Data DOI: | 10.5281/zenodo.8432160 |
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