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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
A systematic fitting scheme for caustic-crossing microlensing events
Monthly Notices of the Royal Astronomical Society, Volume 395, No. 2, Year 2009
Notification
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Description
We outline a method for fitting binary-lens caustic-crossing microlensing events based on the alternative model parametrization proposed and detailed by Cassan. 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-χ2 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 event. © 2009 RAS.
Authors & Co-Authors
Kains, Noé
United Kingdom
Planet/robonet Collaborations
United Kingdom, St Andrews
University of st Andrews
Cassan, Arnaud
United Kingdom
Planet/robonet Collaborations
Germany, Heidelberg
Astronomisches Rechen-institut
Hörne, Keith D.
United Kingdom
Planet/robonet Collaborations
United Kingdom, St Andrews
University of st Andrews
Albrow, Michael D.
United Kingdom
Planet/robonet Collaborations
New Zealand, Christchurch
University of Canterbury
Dieters, Stefan W.B.
United Kingdom
Planet/robonet Collaborations
France, Paris
Institut D’astrophysique de Paris
Fouqué, Pascal
United Kingdom
Planet/robonet Collaborations
France, Toulouse
Université Fédérale Toulouse Midi-pyrénées
Greenhill, John G.
United Kingdom
Planet/robonet Collaborations
Australia, Hobart
University of Tasmania
Udalski, Andrzej
United States, Lens
Optical Gravitational Lens Experiment Ogle Collaboration
Poland, Warsaw
University of Warsaw
Zub, Marta
United Kingdom
Planet/robonet Collaborations
Germany, Heidelberg
Astronomisches Rechen-institut
Germany, Heidelberg
Universität Heidelberg
Bennett, David P.
United Kingdom
Planet/robonet Collaborations
United States, Notre Dame
University of Notre Dame
Dominik, Martin
United Kingdom, St Andrews
University of st Andrews
Donatowicz, J.
United Kingdom
Planet/robonet Collaborations
Austria, Vienna
Technische Universität Wien
Kubas, Daniel
United Kingdom
Planet/robonet Collaborations
Chile, Santiago
European Southern Observatory Santiago
Tsapras, Yiannis
United Kingdom
Planet/robonet Collaborations
United Kingdom, Liverpool
Liverpool John Moores University
Anguita, Timo
Germany, Heidelberg
Astronomisches Rechen-institut
Batista, Virginie
United Kingdom
Planet/robonet Collaborations
France, Paris
Institut D’astrophysique de Paris
Beaulieu, Jean Philippe H.
United Kingdom
Planet/robonet Collaborations
France, Paris
Institut D’astrophysique de Paris
Brillant, Stéphanie
United Kingdom
Planet/robonet Collaborations
Chile, Santiago
European Southern Observatory Santiago
Bode, Michael F.
United Kingdom
Planet/robonet Collaborations
United Kingdom, Liverpool
Liverpool John Moores University
Bramich, Daniel M.
United Kingdom
Planet/robonet Collaborations
Spain, Santa Cruz de la Palma
Isaac Newton Group
Burgdorf, Martin J.
United Kingdom
Planet/robonet Collaborations
United Kingdom, Liverpool
Liverpool John Moores University
Caldwell, John A.R.
United Kingdom
Planet/robonet Collaborations
United States, Davis
Mcdonald Observatory
Cook, Kem H.
United Kingdom
Planet/robonet Collaborations
United States, Livermore
Lawrence Livermore National Laboratory
Coutures, Christian
United Kingdom
Planet/robonet Collaborations
France, Gif-sur-yvette
Cea Saclay
Dominis-Prester, Dijana
United Kingdom
Planet/robonet Collaborations
Croatia, Rijeka
Faculty of Physics, University of Rijeka
Jörgensen, Uffe Gråe
United Kingdom
Planet/robonet Collaborations
Denmark, Copenhagen
Niels Bohr Institutet
Kane, Stephen R.
United Kingdom
Planet/robonet Collaborations
United States, Washington, D.c.
National Aeronautics and Space Administration
Marquette, Jean Baptiste
United Kingdom
Planet/robonet Collaborations
France, Paris
Institut D’astrophysique de Paris
Martin, Ralph
United Kingdom
Planet/robonet Collaborations
Australia, Bickley
Perth Observatory
Menzies, John W.
United Kingdom
Planet/robonet Collaborations
South Africa, Cape Town
South African Astronomical Observatory
Pollard, Karen R.
United Kingdom
Planet/robonet Collaborations
New Zealand, Christchurch
University of Canterbury
Rattenbury, Nicholas James
United Kingdom
Planet/robonet Collaborations
United Kingdom, Manchester
The University of Manchester
Sahu, Kailash C.
United Kingdom
Planet/robonet Collaborations
United States, Baltimore
Space Telescope Science Institute
Snodgrass, Colin
United Kingdom
Planet/robonet Collaborations
Chile, Santiago
European Southern Observatory Santiago
Steele, Iain A.
United Kingdom
Planet/robonet Collaborations
Austria, Vienna
Technische Universität Wien
Vinter, C.
United Kingdom
Planet/robonet Collaborations
Denmark, Copenhagen
Niels Bohr Institutet
Wambsganss, Joachim
United Kingdom
Planet/robonet Collaborations
Germany, Heidelberg
Astronomisches Rechen-institut
Williams, Andrew J.
United Kingdom
Planet/robonet Collaborations
Australia, Bickley
Perth Observatory
Kubiak, Marcin
United States, Lens
Optical Gravitational Lens Experiment Ogle Collaboration
Poland, Warsaw
University of Warsaw
Pietrzýnski, Grzegorz
United States, Lens
Optical Gravitational Lens Experiment Ogle Collaboration
Poland, Warsaw
University of Warsaw
Chile, Biobio
Universidad de Concepcion
Soszyński, Igor
United States, Lens
Optical Gravitational Lens Experiment Ogle Collaboration
Poland, Warsaw
University of Warsaw
Szewczyk, Olaf
United States, Lens
Optical Gravitational Lens Experiment Ogle Collaboration
Poland, Warsaw
University of Warsaw
Chile, Biobio
Universidad de Concepcion
Szymánski, Michał K.
United States, Lens
Optical Gravitational Lens Experiment Ogle Collaboration
Poland, Warsaw
University of Warsaw
Ulaczyk, Krzysztof
United States, Lens
Optical Gravitational Lens Experiment Ogle Collaboration
Poland, Warsaw
University of Warsaw
Wyrzykowski, Łukasz
United Kingdom, Liverpool
Liverpool John Moores University
United Kingdom, Cambridge
Institute of Astronomy
Statistics
Citations: 45
Authors: 45
Affiliations: 28
Identifiers
Doi:
10.1111/j.1365-2966.2009.14615.x
ISSN:
00358711
e-ISSN:
13652966