IMPLICATIONS FOR THE ORIGIN OF GRB 051103 FROM LIGO OBSERVATIONS
IMPLICATIONS FOR THE ORIGIN OF GRB 051103 FROM LIGO OBSERVATIONS
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DOI：
10.1088/0004-637x/755/1/2
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发表时间：
2012-08-10
影响因子：
4.9
通讯作者：
Was, M.
中科院分区：
文献类型：
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作者：
Abadie, J.;Abbott, B. P.;Was, M.
我们展示了 LIGO 搜索与 GRB 051103 相关的引力波 (GW) 的结果，GRB 051103 是一种短时硬谱伽马射线暴 (GRB)，其电磁确定的天空位置与螺旋星系 M81 重合，距地球 3.6 Mpc。短硬伽玛暴的可能起源包括致密天体合并和软伽马中继器（SGR）巨型耀斑。合并前体将产生特征性的引力波信号，该信号应在 M81 的距离处可检测到，而 SGR 发出的引力波预计在该距离处不可检测到。我们没有发现与 GRB 051103 相关的引力波信号的证据。假设喷射半角为 30 度的弱束伽马射线发射，我们排除 M81 中的双中子星合并作为其前身，置信度为 98%。中子星-黑洞合并被排除在外，置信度 >99%。如果该事件发生在 M81，那么我们的发现支持 GRB 051103 是由 SGR 巨型耀斑造成的假设，使其成为迄今为止观测到的最遥远的河外磁星之一。
We present the results of a LIGO search for gravitational waves (GWs) associated with GRB 051103, a short-duration hard-spectrum gamma-ray burst (GRB) whose electromagnetically determined sky position is coincident with the spiral galaxy M81, which is 3.6 Mpc from Earth. Possible progenitors for short-hard GRBs include compact object mergers and soft gamma repeater (SGR) giant flares. A merger progenitor would produce a characteristic GW signal that should be detectable at a distance of M81, while GW emission from an SGR is not expected to be detectable at that distance. We found no evidence of a GW signal associated with GRB 051103. Assuming weakly beamed gamma-ray emission with a jet semi-angle of 30 degrees, we exclude a binary neutron star merger in M81 as the progenitor with a confidence of 98%. Neutron star-black hole mergers are excluded with >99% confidence. If the event occurred in M81, then our findings support the hypothesis that GRB 051103 was due to an SGR giant flare, making it one of the most distant extragalactic magnetars observed to date.