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Pregled bibliografske jedinice broj: 371212

Časopis

Autori: Kains, N.; Cassan, A.; Horne, K.; Albrow, M. D.; Dieters, S.; Fouque, P.; Greenhill, J.; Udalski, A.; Zub, M.; Bennett, D.P.; Dominik, M.; Donatowicz, J.; Kubas, D.; Tsapras, Y.; Anguita, T.; Batista, V.; Beaulieu, J.-P.; Brillant, S.; Bode, M.; Bramich, D.M.; Burgdorf, M.; Caldwell, J. A. R.; Cook, K. H.; Coutures, Ch.; Dominis Prester, Dijana; Joergensen, U.G.; Kane, S.; Marquette, J.B.; Martin, R.; Menzies, J.; Pollard, K.R.; Rattenbury, N.; Sahu, K. C.; Snodgrass, C.; Steele, I.; Vinter, C.; Wambsganss, J.; Williams, A.; Kubiak, M.; Pietrzynski, G.; Soszy´nski, I.; Szewczyk, O.; Szymanski, M.K.; Ulaczyk, K.; Wyrzykowski, L.
Naslov: A systematic fitting scheme for caustic-crossing microlensing events
Izvornik: Monthly notices of the Royal Astronomical Society (0035-8711) 395 (2009), 2; 787-796
Vrsta rada: članak
Ključne riječi: gravitational microlensing; data modelling; extrasolar planets; binary stars; robotic telescopes
Sažetak:
We outline a method for fitting binary-lens caustic-crossing microlensing events based on the alternative model parameterisation proposed and detailed in Cassan (2008). As an illustration of our methodology, we present an analysis of OGLE-2007-BLG-472, a double-peaked Galactic microlensing event with a source crossing the whole caustic structure in less than three days. In order to identify all possible models we conduct an extensive search of the parameter space, followed by a refinement of the parameters with a Markov Chain-Monte Carlo algorithm. We find a number of low-chi2 regions in the parameter space, which lead to several distinct competitive best models. We examine the parameters for each of them, and estimate their physical properties. We find that our fitting strategy locates several minima that are difficult to find with other modelling strategies and is therefore a more appropriate method to fit this type of events.
Projekt / tema: 316-0000000-2824
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL Internet adrese: http://adsabs.harvard.edu/abs/2009MNRAS.395..787K
http://arxiv.org/abs/0901.1285
URL cjelovitog teksta:
Google Scholar: A systematic fitting scheme for caustic-crossing microlensing events
Upisao u CROSBI: dijana@uniri.hr (dijana@uniri.hr), 12. Stu. 2008. u 12:26 sati



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