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Titolo: A novel approach for extracting time-delays from lightcurves of lensed quasar images
Autore: Burud, I; Magain, P; Sohy, S; Hjorth, J;
- Indirizzi:
- Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Belgium Univ Liege Liege Belgium B-4000 trophys & Geophys, B-4000 Liege, Belgium Space Telescope Sci Inst, Baltimore, MD 21218 USA Space Telescope Sci Inst Baltimore MD USA 21218 , Baltimore, MD 21218 USA Univ Copenhagen, Astron Observ, DK-2100 Copenhagen, Denmark Univ Copenhagen Copenhagen Denmark DK-2100 , DK-2100 Copenhagen, Denmark
- Titolo Testata:
- ASTRONOMY & ASTROPHYSICS
fascicolo: 2,
volume: 380,
anno: 2001,
pagine: 805 - 810
- SICI:
- 1432-0746(200112)380:2<805:ANAFET>2.0.ZU;2-D
- Fonte:
- ISI
- Lingua:
- ENG
- Keywords:
- methods : data analysis; gravitational lensing;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 11
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Burud, I Univ Liege, Inst Astrophys & Geophys, Ave Cointe 5, B-4000 Liege,Belgium Univ Liege Ave Cointe 5 Liege Belgium B-4000 4000 Liege, Belgium
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- Citazione:
- I. Burud et al., "A novel approach for extracting time-delays from lightcurves of lensed quasar images", ASTRON ASTR, 380(2), 2001, pp. 805-810
Abstract
We 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 anda numerical model light curve. A linear variation can be included in orderto 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 correctfor 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 publisheddata set for the lensed double Q 0957+561 yields results in agreement withother published estimates.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/05/13 alle ore 03:45:31