A novel approach for extracting time-delays from lightcurves of lensed quasar images

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dc.creatorBurud, I.
dc.creatorMagain, P.
dc.creatorSohy, S.
dc.creatorHjorth, J.
dc.date2001-10-30
dc.date.accessioned2026-07-07T02:01:06Z
dc.date.available2026-07-07T02:01:06Z
dc.descriptionWe present a new method to estimate time delays from light curves of lensed quasars. The method is based on chi^2 minimization between the data and a numerical model light curve. A linear variation can be included in order to correct for slow long-term microlensing effects in one of the lensed images. An iterative version of the method can be applied in order to correct for higher order microlensing effects. The method is tested on simulated light curves. When higher order microlensing effects are present the time delay is best constrained with the iterative method. Analysis of a published data set for the lensed double Q0957+561 yields results in agreement with other published estimates.
dc.description6 pages, accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0110668
dc.identifierhttp://arxiv.org/abs/astro-ph/0110668
dc.identifierAstron.Astrophys. 380 (2001) 805-810
dc.identifierdoi:10.1051/0004-6361:20011473
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/3629
dc.subjectAstrophysics
dc.titleA novel approach for extracting time-delays from lightcurves of lensed quasar images
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