Rapid Premerger Localization of Binary Neutron Stars in Third-generation Gravitational-wave Detectors

Premerger localization of binary neutron stars (BNSs) is one of the most important scientific goals for the third-generation (3G) gravitational-wave detectors. It will enable the electromagnetic observation of the whole process of BNS coalescence, especially for the premerger and merger phases, whic...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2023-12, Vol.958 (2), p.L43
Main Authors: Hu, Qian, Veitch, John
Format: Article
Language:English
Subjects:
Algorithms
Binary stars
Coalescence
Compact binary stars
Detectors
Gravitational wave astronomy
Gravitational waves
Localization
Neutron stars
Warning systems
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Summary:Premerger localization of binary neutron stars (BNSs) is one of the most important scientific goals for the third-generation (3G) gravitational-wave detectors. It will enable the electromagnetic observation of the whole process of BNS coalescence, especially for the premerger and merger phases, which have not been observed yet, opening a window for deeper understandings of compact objects. To reach this goal, we describe a novel combination of multiband matched filtering and semianalytical localization algorithms to achieve early-warning localization of long BNS signals in 3G detectors. Using our method we are able to efficiently simulate one month of observations with a three-detector 3G network, and show that it is possible to provide accurate sky localizations more than 30 minutes before the merger. Our simulation shows that there could be ∼10 (∼100) BNS events localized within 100 deg 2 , 20 (6) minutes before merger, per month of observation.
ISSN:2041-8205
2041-8213
DOI:10.3847/2041-8213/ad0ed4