An Early-warning System for Electromagnetic Follow-up of Gravitational-wave Events
Sachdev, Surabhi; Magee, Ryan; Hanna, Chad; Cannon, Kipp; Singer, Leo; SK, Javed Rana; Mukherjee, Debnandini; Caudill, Sarah; Chan, Chiwai; Creighton, Jolien D. E.; Ewing, Becca; Fong, Heather; Godwin, Patrick; Huxford, Rachael; Kapadia, Shasvath; Li, Alvin K. Y.; Lok Lo, Rico Ka; Meacher, Duncan; Messick, Cody; Mohite, Siddharth R.; Nishizawa, Atsushi; Ohta, Hiroaki; Pace, Alexander; Reza, Amit; Sathyaprakash, B. S.; Shikauchi, Minori; Singh, Divya; Tsukada, Leo; Tsuna, Daichi; Tsutsui, Takuya; Ueno, Koh
(2020) Astrophysical Journal Letters, volume 905, issue 2, pp. 1 - 6
(Article)
Abstract
Binary neutron stars (BNSs) will spend ≅10–15 minutes in the band of Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo detectors at design sensitivity. Matched-filtering of gravitational-wave (GW) data could in principle accumulate enough signal-to-noise ratio (S/N) to identify a forthcoming event tens of seconds before the companions collide and
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merge. Here we report on the design and testing of an early-warning GW detection pipeline. Early-warning alerts can be produced for sources that are at low enough redshift so that a large enough S/N accumulates ∼10–60 s before merger. We find that about 7% (49%) of the total detectable BNS mergers will be detected 60 s (10 s) before the merger. About 2% of the total detectable BNS mergers will be detected before merger and localized to within 100 deg2 (90% credible interval). Coordinated observing by several wide-field telescopes could capture the event seconds before or after the merger. LIGO–Virgo detectors at design sensitivity could facilitate observing at least one event at the onset of merger.
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Keywords: Neutron stars, Gravitational waves
ISSN: 2041-8205
Publisher: IOP Publishing Ltd.
(Peer reviewed)