TY - JOUR
T1 - Low-latency gravitational wave alert products and their performance at the time of the fourth LIGO-Virgo-KAGRA observing run
AU - LIGO Scientific Collaboration
AU - Chaudhary, Sushant Sharma
AU - Toivonen, Andrew
AU - Waratkar, Gaurav
AU - Mo, Geoffrey
AU - Chatterjee, Deep
AU - Antier, Sarah
AU - Brockill, Patrick
AU - Coughlin, Michael W.
AU - Essick, Reed
AU - Ghosh, Shaon
AU - Morisaki, Soichiro
AU - Baral, Pratyusava
AU - Baylor, Amanda
AU - Adhikari, Naresh
AU - Brady, Patrick
AU - Cabourn Davies, Gareth
AU - Dal Canton, Tito
AU - Cavaglia, Marco
AU - Creighton, Jolien
AU - Choudhary, Sunil
AU - Chu, Yu Kuang
AU - Clearwater, Patrick
AU - Davis, Luke
AU - Dent, Thomas
AU - Drago, Marco
AU - Ewing, Becca
AU - Godwin, Patrick
AU - Guo, Weichangfeng
AU - Hanna, Chad
AU - Huxford, Rachael
AU - Harry, Ian
AU - Katsavounidis, Erik
AU - Kovalam, Manoj
AU - Li, Alvin K.Y.
AU - Magee, Ryan
AU - Marx, Ethan
AU - Meacher, Duncan
AU - Messick, Cody
AU - Morice-Atkinson, Xan
AU - Pace, Alexander
AU - De Pietri, Roberto
AU - Piotrzkowski, Brandon
AU - Roy, Soumen
AU - Sachdev, Surabhi
AU - Singer, Leo P.
AU - Singh, Divya
AU - Szczepanczyk, Marek
AU - Tang, Daniel
AU - Trevor, Max
AU - Tsukada, Leo
PY - 2024/4/30
Y1 - 2024/4/30
N2 - 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 resumed with ALIGO's, AdVirgo's and KAGRA's fourth observing run (O4). To 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 theMDCand serves as a useful reference for the interpretation of O4 detections.
AB - 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 resumed with ALIGO's, AdVirgo's and KAGRA's fourth observing run (O4). To 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 theMDCand serves as a useful reference for the interpretation of O4 detections.
KW - compact binary mergers
KW - gravitational waves
KW - multimessenger astronomy
UR - http://www.scopus.com/inward/record.url?scp=85191365654&partnerID=8YFLogxK
UR - https://doi.org/10.48550/arXiv.2308.04545
UR - https://v2.sherpa.ac.uk/id/publication/10338
U2 - 10.1073/pnas.2316474121
DO - 10.1073/pnas.2316474121
M3 - Article
C2 - 38652749
AN - SCOPUS:85191365654
SN - 0027-8424
VL - 121
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 18
M1 - e2316474121
ER -