论文标题
Fermi-GBM GRB观察090717034：$χ^2 $测试证实了带有百万个太阳能质量的超质量黑洞的重力镜头的证据
Fermi-GBM Observation of GRB 090717034: $χ^2$ Test Confirms Evidence of Gravitational Lensing by a Supermassive Black Hole with Million Solar Mass
论文作者
论文摘要
伽马射线爆发（GRB）的重力镜头可以提供一个机会，以探测不同红移的宇宙中巨大的紧凑物体。我们在GRB 090717034的光曲线中发现了两个连续的脉冲，具有相同的时间剖面和不同的计数速率，分别为时间间隔，这些脉冲在Fermi/GBM GRB GRB Catalog catalog \ citep \ citep {kalantari}中被确定为重力镜头候选。在这里，我们使用$χ^2 $方法来研究两种脉冲作为重力镜头候选GRB的时间分布变异性的相似性。我们发现两种脉冲之间的放大因子和时间延迟，以对应于最小化$χ^2 $函数。然后，我们对模拟透镜GRB的样本进行了蒙特卡洛模拟，并将镜头GRB候选者的$χ^2 $与模拟进行了比较，该模拟证实了该候选者的置信水平为$1σ$。假设GRB 090717034由点状对象镜头镜头，则红移镜头质量约为$ m_l（1+z）=（4.220 \ pm 6.615）\ times 10^6 m _ {\ odot} $。该GRB的镜头是沿着GRB的视线沿线的超大黑洞的候选者。
Gravitational lensing of gamma-ray bursts (GRBs) can provide an opportunity to probe the massive compact objects in the universe at different redshifts. We have discovered two consecutive pulses in the light curve of GRB 090717034, with the same temporal profile and different count rate, separated by a time interval, which is identified as gravitationally lensed candidate in Fermi/GBM GRB catalogue \citep{Kalantari}. Here, we use the $χ^2$ method to investigate the similarity of the temporal profile variability of the two pulses as a gravitationally lensed candidate GRB. We find the magnification factor and the time delay between two pulses to correspond to minimising the $χ^2$ function. Then, we perform a Monte Carlo simulation on a sample of mock lensed GRBs and compare the $χ^2$ of the lensed GRB candidate with the simulation, which confirms this candidate with $1σ$ confidence level. Assuming that GRB 090717034 is lensed by a point-like object, the redshifted lens mass is about $M_L(1+z)=(4.220\pm 6.615) \times 10^6 M_{\odot}$. The lens of this GRB is a candidate for a super-massive black hole along the line of sight to the GRB.
