Reference : A novel approach for extracting time-delays from lightcurves of lensed quasar images
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/16789
A novel approach for extracting time-delays from lightcurves of lensed quasar images
English
Burud, I. mailto [Institut d'Astrophysique et de Géophysique, Université de Liège, Avenue de Cointe 5, 4000 Liège, Belgium; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA,]
Magain, Pierre mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Sohy, Sandrine mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Hjorth, J. mailto [Astronomical Observatory, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark]
1-Dec-2001
Astronomy and Astrophysics
EDP Sciences
380
805-810
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] METHODS: DATA ANALYSIS ; GRAVITATIONAL LENSING
[en] We present a new method to estimate time delays from light curves of lensed quasars. The method is based on chi [SUP]2[/SUP] 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 Q 0957+561 yields results in agreement with other published estimates.
Researchers ; Professionals
http://hdl.handle.net/2268/16789
10.1051/0004-6361:20011473
http://adsabs.harvard.edu/abs/2001A%26A...380..805B
http://de.arxiv.org/abs/astro-ph/0110668
The authors thank EDP Sciences for their deposit authorization

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