A systematic fitting scheme for caustic-crossing microlensing events

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 sour...

Descripción completa

Detalles Bibliográficos
Autores: Kains, N., Pietrzynski, G., Szewczyk, O.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:Chile
Idioma:inglés
OAI Identifier:oai:repositorio.anid.cl:10533/237044
Acceso en línea:https://hdl.handle.net/10533/237044
Access Level:acceso abierto
id CL_cbdacf9250b91ecb6acefdb8889c5a7c
oai_identifier_str oai:repositorio.anid.cl:10533/237044
network_acronym_str CL
network_name_str Chile
repository_id_str
spelling Szewczyk, O.Pietrzynski, G.Kains, N.200910.1111/j.1365-2966.2009.14615.xhttps://hdl.handle.net/10533/237044http://purl.org/coar/access_right/c_abf2A systematic fitting scheme for caustic-crossing microlensing eventsKains, N.Pietrzynski, G.Szewczyk, O.2019-12-18T18:14:38Z2022-07-07T22:01:55Z2019-12-18T18:14:38Z2022-07-07T22:01:55Z2009We 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.FONDAPFONDAP1501000315010003virtual::27162-1WOS:000265509500015https://hdl.handle.net/10533/237044enginstname: Conicytreponame: Repositorio Digital RI2.010.1111/j.1365-2966.2009.14615.xinfo:eu-repo/grantAgreement/Fondap/15010003https://researchers.unab.cl/es/publications/a-systematic-fitting-scheme-for-caustic-crossing-microlensing-eveAtribución-NoComercial-SinDerivadas 3.0 Chilehttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/info:eu-repo/semantics/openAccessA systematic fitting scheme for caustic-crossing microlensing eventsMonthly Notices Of The Royal Astronomical SocietyArticuloinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttps://hdl.handle.net/10533/237044http://purl.org/coar/resource_type/c_2df8fbb1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::27162-1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::27162-110533/237044oai:repositorio.anid.cl:10533/2370442023-07-24 21:04:01.598https://repositorio.anid.clRepositorio ANIDaletelier@anid.cl
dc.title.none.fl_str_mv A systematic fitting scheme for caustic-crossing microlensing events
dc.title.journal.none.fl_str_mv Monthly Notices Of The Royal Astronomical Society
title A systematic fitting scheme for caustic-crossing microlensing events
spellingShingle A systematic fitting scheme for caustic-crossing microlensing events
Kains, N.
title_short A systematic fitting scheme for caustic-crossing microlensing events
title_full A systematic fitting scheme for caustic-crossing microlensing events
title_fullStr A systematic fitting scheme for caustic-crossing microlensing events
title_full_unstemmed A systematic fitting scheme for caustic-crossing microlensing events
title_sort A systematic fitting scheme for caustic-crossing microlensing events
dc.creator.none.fl_str_mv Kains, N.
Pietrzynski, G.
Szewczyk, O.
author Kains, N.
author_facet Kains, N.
Pietrzynski, G.
Szewczyk, O.
author_role author
author2 Pietrzynski, G.
Szewczyk, O.
author2_role author
author
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.
publishDate 2009
dc.date.issued.none.fl_str_mv 2009
dc.date.accessioned.none.fl_str_mv 2019-12-18T18:14:38Z
2022-07-07T22:01:55Z
dc.date.available.none.fl_str_mv 2019-12-18T18:14:38Z
2022-07-07T22:01:55Z
dc.type.none.fl_str_mv Articulo
dc.type.driver.none.fl_str_mv info:eu-repo/semantics/article
dc.type.openaire.none.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.folio.none.fl_str_mv 15010003
15010003
dc.identifier.idwos.none.fl_str_mv WOS:000265509500015
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10533/237044
identifier_str_mv 15010003
WOS:000265509500015
url https://hdl.handle.net/10533/237044
dc.language.iso.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv instname: Conicyt
reponame: Repositorio Digital RI2.0
dc.relation.doi.none.fl_str_mv 10.1111/j.1365-2966.2009.14615.x
dc.relation.projectid.none.fl_str_mv info:eu-repo/grantAgreement/Fondap/15010003
dc.relation.uri.none.fl_str_mv https://researchers.unab.cl/es/publications/a-systematic-fitting-scheme-for-caustic-crossing-microlensing-eve
dc.rights.none.fl_str_mv Atribución-NoComercial-SinDerivadas 3.0 Chile
http://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.rights.driver.none.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial-SinDerivadas 3.0 Chile
http://creativecommons.org/licenses/by-nc-nd/3.0/cl/
eu_rights_str_mv openAccess
repository.name.fl_str_mv Repositorio ANID
repository.mail.fl_str_mv aletelier@anid.cl
_version_ 1843518452022640640
score 15,812429

Similares en LA Referencia