Kernel regression estimates of time delays between gravitationally lensed fluxes

Sultanah Al Otaibi, Peter Tiňo, Juan C. Cuevas-tello, Ilya Mandel, Somak Raychaudhury

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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 data sets for the same quasar. We develop realistic artificial data sets in order to carry out controlled experiments to test the 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.
Original languageEnglish
Pages (from-to)573-584
JournalRoyal Astronomical Society. Monthly Notices
Volume459
Issue number1
Early online date7 Mar 2016
DOIs
Publication statusPublished - 11 Jun 2016

Keywords

  • gravitational lensing: strong
  • methods: data analysis

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