IHEP OpenIR  > 硬X射线调制望远镜卫星
Multi-messenger Observations of a Binary Neutron Star Merger
The Insight-HXMT Collaboration
Source PublicationThe Astrophysical Journal

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of similar to 1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg(2) at a luminosity distance of 40(-8)(+8) Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 M-circle dot. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at similar to 40 Mpc) less than 11 hours after the merger by the One-Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over similar to 10 days. Following early non-detections, X-ray and radio emission were discovered at the transient's position similar to 9 and similar to 16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta.

Keywordgravitational waves stars: neutron
Research Direction科学结果
Member Type核心团队
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000413211000001
ADS Bibcode2017ApJ...848L..12A
ADS URLhttps://ui.adsabs.harvard.edu/abs/2017ApJ...848L..12A
major scientific facilities硬X射线调制望远镜
Citation statistics
Cited Times:1334[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:1723 [INSPIRE]
Cited Times:1626 [ADS]
Document Type期刊论文
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
The Insight-HXMT Collaboration. Multi-messenger Observations of a Binary Neutron Star Merger[J]. The Astrophysical Journal,2017,848(2):L12.
APA The Insight-HXMT Collaboration.(2017).Multi-messenger Observations of a Binary Neutron Star Merger.The Astrophysical Journal,848(2),L12.
MLA The Insight-HXMT Collaboration."Multi-messenger Observations of a Binary Neutron Star Merger".The Astrophysical Journal 848.2(2017):L12.
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