Low-latency gravitational wave alert products and their performance at the time of the fourth LIGO-Virgo-KAGRA observing run

• 成果类型: Article
• 署名作者: Chaudhary, Sushant Sharma; Toivonen, Andrew; Waratkar, Gaurav; Mo, Geoffrey; Chatterjee, Deep; Antier, Sarah; Brockill, Patrick; Coughlin, Michael W.; Essick, Reed; Ghosh, Shaon; Morisaki, Soichiro; Baral, Pratyusava; Baylor, Amanda; Adhikari, Naresh; Brady, Patrick; Davies, Gareth Cabourn; Dal Canton, Tito; Cavaglia, Marco; Creighton, Jolien; Choudhary, Sunil; Chu, Yu-Kuang; Clearwater, Patrick; Davis, Luke; Dent, Thomas; Drago, Marco; Ewing, Becca; Godwin, Patrick; Guo, Weichangfeng; Hanna, Chad; Huxford, Rachael; Harry, Ian; Katsavounidis, Erik; Kovalam, Manoj; Li, Alvin K. Y.; Magee, Ryan; Marx, Ethan; Meacher, Duncan; Messick, Cody; Atkinson, Xan Morice; Pace, Alexander; De Pietri, Roberto; Piotrzkowski, Brandon; Roy, Soumen; Sachdev, Surabhi; Singer, Leo P.; Singh, Divya; Bahcall, Neta; Szczepanczyk, Marek; Tang, Daniel; Trevor, Max; Tsukada, Leo; Villa-Ortega, Veronica; Wen, Linqing; Wysocki, Daniel
• 署名单位: University of Missouri System; Missouri University of Science & Technology; University of Minnesota System; University of Minnesota Twin Cities; Indian Institute of Technology System (IIT System); Indian Institute of Technology (IIT) - Bombay; Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT); Universite Cote d'Azur; Observatoire de la Cote d'Azur; University of Wisconsin System; University of Wisconsin Milwaukee; University of Toronto; University of Toronto; University of Toronto; Montclair State University; University of Tokyo; University of Portsmouth; Universite Paris Cite; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute of Nuclear and Particle Physics (IN2P3); University of Wisconsin System; University of Wisconsin Milwaukee; University of Western Australia; Universidade de Santiago de Compostela; Sapienza University Rome; Istituto Nazionale di Fisica Nucleare (INFN); Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; California Institute of Technology; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; University of Portsmouth; University of Parma; Istituto Nazionale di Fisica Nucleare (INFN); FOM National Institute for Subatomic Physics; Utrecht University; University System of Georgia; Georgia Institute of Technology; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; University System of Maryland; University of Maryland College Park; State University System of Florida; University of Florida; University System of Maryland; University of Maryland College Park
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-14437
• DOI: 10.1073/pnas.2316474121
• 发表日期: 2024-04-30
• 关键词: equation-of-state; neutron; identification; constraints; merger; mass

摘要

Multimessenger searches for binary neutron star (BNS) and neutron star-black hole (NSBH) mergers are currently one of the most exciting areas of astronomy. The search for joint electromagnetic and neutrino counterparts to gravitational wave (GW)s has support this effort, public semiautomated data products are sent in near real-time and include localization and source properties to guide complementary observations. In preparation for O4, we have conducted a study using a simulated population of compact binaries and a mock data challenge (MDC) in the form of a real-time replay to optimize and profile the software infrastructure and scientific deliverables. End-toend performance was tested, including data ingestion, running online search pipelines, performing annotations, and issuing alerts to the astrophysics community. We present an overview of the low-latency infrastructure and the performance of the data products that are now being released during O4 based on the MDC. We report the expected median latency for the preliminary alert of full bandwidth searches (29.5 s) and show consistency and accuracy of released data products using the MDC. We report the expected median latency for triggers from early warning searches (-3.1 s), which are new in O4 and target neutron star mergers during inspiral phase. This paper provides a performance overview for LIGO-Virgo-KAGRA (LVK) low-latency alert infrastructure and data products using the MDC and serves as a useful reference for the interpretation of O4 detections.