@article{8fb017619a5d401fb29ae28f009399d8,
title = "Establishing significance of gravitational-wave signals from a single observatory in the PyCBC offline search",
abstract = "Gravitational-wave observations of compact binary coalescences are allowing us to see black holes and neutron stars further into the Universe and recent results represent the most sensitive searches for compact objects ever undertaken. Most searches for gravitational waves from compact binary coalescence currently rely on detecting coincident triggers from multiple detectors. In this paper, we describe a new method for extrapolating significance of single-detector signals beyond the live-time of the analysis. Using this method, we can recover loud signals which only triggered in a single detector. We demonstrate this method in a search of O3 data, and recover seven single-detector events with a false alarm rate less than two per year. These were the same events as discovered in the GWTC-2.1 and GWTC-3 searches in a single detector, and all but one event from 3-OGC and 4-OGC. Through a campaign of injected signals, we estimate that the total time–volume sensitivity increases by a factor of up to 1.20 ± 0.02 at a false alarm rate of one per two years compared to completely ignoring single-detector events.",
keywords = "gravitational waves, gravitational-wave astrophysics, binary compact objects, UKRI, STFC, ST/T000333/1, ST/V005715/1",
author = "{Cabourn Davies}, {Gareth Stephen} and Ian Harry",
note = "The authors acknowledge the Science and Technology Funding Council (STFC) for funding through Grants ST/T000333/1 and ST/V005715/1. We are grateful to Fr{\'e}d{\'e}rique Marion and Thomas Dent for help and comments on the manuscript. This material is based upon work supported by National Science Foundation (NSF)'s LIGO Laboratory which is a major facility fully funded by the NSF. This research has made use of data or software available from the Gravitational Wave Open Science Centre (gw-openscience.org), a service of LIGO Laboratory, the LIGO Scientific Collaboration, the Virgo Collaboration, and KAGRA. LIGO Laboratory and Advanced LIGO 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 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, Spain. The construction and operation of KAGRA are funded by Ministry of Education, Culture, Sports, Science and Technology (MEXT), and Japan Society for the Promotion of Science (JSPS), National Research Foundation (NRF) and Ministry of Science and ICT (MSIT) in Korea, Academia Sinica (AS) and the Ministry of Science and Technology (MoST) in Taiwan. The authors are grateful for the computational resources and data provided by the LIGO Laboratory and supported by National Science Foundation Grant Nos. PHY-0757058 and PHY-0823459. The authors also acknowledge the use of the IUCAA LDG cluster, Sarathi, for computational/numerical work. The PyCBC offline search software used was based on PyCBC release 1.18.1. The PyCBC offline search software is built upon LALSuite, numpy, SciPy, Astropy and Pegasus.",
year = "2022",
month = sep,
day = "29",
doi = "10.1088/1361-6382/ac8862",
language = "English",
volume = "39",
journal = "Classical and Quantum Gravity",
issn = "0264-9381",
publisher = "IOP Publishing",
number = "21",
}