Kernel regression estimates of time delays between gravitationally lensed fluxes
Kernel regression estimates of time delays between gravitationally lensed fluxes
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DOI：
10.1093/mnras/stw510
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发表时间：
2015-08
影响因子：
4.8
通讯作者：
Sultanah Al Otaibi;Peter Tivno;J. Cuevas-Tello;I. Mandel;Somak Raychaudhury
中科院分区：
文献类型：
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作者：
Sultanah Al Otaibi;Peter Tivno;J. Cuevas-Tello;I. Mandel;Somak Raychaudhury
强透镜可变类星体可以用作精确的宇宙学探测器，只要可以精确测量图像通量之间的时间延迟。已经提出了多种方法来解决这个问题。在本文中，我们详细探索了一种基于核回归估计的新方法，该方法能够在给定同一类星体的多个数据集的情况下估计单个时间延迟。我们开发真实的人工数据集，以便进行受控实验来测试这种新方法的性能。我们还使用来自强透镜类星体 Q0957+561 的真实数据测试我们的方法，并将我们的估计与现有结果进行比较。
Strongly lensed variable quasars can serve as precise cosmological probes, provided that time delays between the image fluxes can be accurately measured. A number of methods have been proposed to address this problem. In this paper, we explore in detail a new approach based on kernel regression estimates, which is able to estimate a single time delay given several datasets for the same quasar. We develop realistic artificial data sets in order to carry out controlled experiments to test of performance of this new approach. We also test our method on real data from strongly lensed quasar Q0957+561 and compare our estimates against existing results.