Kernel regression estimates of time delays between gravitationally lensed fluxes

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 esti...

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Bibliographic Details
Published in:arXiv.org 2016-03
Main Authors: Sultanah AL Otaibi, Tiňo, Peter, Cuevas-Tello, Juan C, Mandel, Ilya, Raychaudhury, Somak
Format: Article
Language:English
Subjects:
Estimates
Fluxes
Kernels
Quasars
Regression analysis
Test procedures
Time lag
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1508.03439