Flux and color variations of the quadruply imaged quasar HE 0435-1223

We present VRi photometric observations of the quadruply imaged quasarHE0435-1223, carried out with the Danish 1.54 m telescope at the La Silla Observatory. Our aim was to monitor and study the magnitudes and colors of each lensed component as a function of time. Methods. We monitored the object dur...

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Detalles Bibliográficos
Autores: Ricci, D., Anguita, T.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:Chile
Idioma:inglés
OAI Identifier:oai:repositorio.anid.cl:10533/237302
Acceso en línea:https://hdl.handle.net/10533/237302
Access Level:acceso abierto
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spelling Anguita, T.Ricci, D.201110.1051/0004-6361/201016188https://hdl.handle.net/10533/237302http://purl.org/coar/access_right/c_abf2Flux and color variations of the quadruply imaged quasar HE 0435-1223Ricci, D.Anguita, T.2019-12-18T18:15:12Z2022-07-07T23:39:54Z2019-12-18T18:15:12Z2022-07-07T23:39:54Z2011We present VRi photometric observations of the quadruply imaged quasarHE0435-1223, carried out with the Danish 1.54 m telescope at the La Silla Observatory. Our aim was to monitor and study the magnitudes and colors of each lensed component as a function of time. Methods. We monitored the object during two seasons (2008 and 2009) in the VRi spectral bands, and reduced the data with two independent techniques: difference imaging and point spread function (PSF) fitting. Results. Between these two seasons, our results show an evident decrease in flux by ≈ 0.2–0.4 magnitudes of the four lensed components in the three filters. We also found a significant increase ( ≈ 0.05–0.015) in their V − R and R − i color indices. Conclusions. These flux and color variations are very likely caused by intrinsic variations of the quasar between the observed epochs. Microlensing effects probably also affect the brightest “A” lensed component.FONDAPFONDAP1501000315010003virtual::39291-1WOS:000288541600048https://hdl.handle.net/10533/237302enginstname: Conicytreponame: Repositorio Digital RI2.010.1051/0004-6361/201016188info:eu-repo/grantAgreement/Fondap/15010003https://www.aanda.org/articles/aa/abs/2011/04/aa16188-10/aa16188-10.htmlAtribución-NoComercial-SinDerivadas 3.0 Chilehttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/info:eu-repo/semantics/openAccessFlux and color variations of the quadruply imaged quasar HE 0435-1223Astronomy & AstrophysicsArticuloinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttps://hdl.handle.net/10533/237302http://purl.org/coar/resource_type/c_2df8fbb1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::39291-1045fc0e1-ef55-4532-8afe-69fe789d964dvirtual::39291-110533/237302oai:repositorio.anid.cl:10533/2373022023-07-24 15:58:23.003https://repositorio.anid.clRepositorio ANIDaletelier@anid.cl
dc.title.none.fl_str_mv Flux and color variations of the quadruply imaged quasar HE 0435-1223
dc.title.journal.none.fl_str_mv Astronomy & Astrophysics
title Flux and color variations of the quadruply imaged quasar HE 0435-1223
spellingShingle Flux and color variations of the quadruply imaged quasar HE 0435-1223
Ricci, D.
title_short Flux and color variations of the quadruply imaged quasar HE 0435-1223
title_full Flux and color variations of the quadruply imaged quasar HE 0435-1223
title_fullStr Flux and color variations of the quadruply imaged quasar HE 0435-1223
title_full_unstemmed Flux and color variations of the quadruply imaged quasar HE 0435-1223
title_sort Flux and color variations of the quadruply imaged quasar HE 0435-1223
dc.creator.none.fl_str_mv Ricci, D.
Anguita, T.
author Ricci, D.
author_facet Ricci, D.
Anguita, T.
author_role author
author2 Anguita, T.
author2_role author
description We present VRi photometric observations of the quadruply imaged quasarHE0435-1223, carried out with the Danish 1.54 m telescope at the La Silla Observatory. Our aim was to monitor and study the magnitudes and colors of each lensed component as a function of time. Methods. We monitored the object during two seasons (2008 and 2009) in the VRi spectral bands, and reduced the data with two independent techniques: difference imaging and point spread function (PSF) fitting. Results. Between these two seasons, our results show an evident decrease in flux by ≈ 0.2–0.4 magnitudes of the four lensed components in the three filters. We also found a significant increase ( ≈ 0.05–0.015) in their V − R and R − i color indices. Conclusions. These flux and color variations are very likely caused by intrinsic variations of the quasar between the observed epochs. Microlensing effects probably also affect the brightest “A” lensed component.
publishDate 2011
dc.date.issued.none.fl_str_mv 2011
dc.date.accessioned.none.fl_str_mv 2019-12-18T18:15:12Z
2022-07-07T23:39:54Z
dc.date.available.none.fl_str_mv 2019-12-18T18:15:12Z
2022-07-07T23:39:54Z
dc.type.none.fl_str_mv Articulo
dc.type.driver.none.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10533/237302
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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 10.1051/0004-6361/201016188
dc.relation.projectid.none.fl_str_mv info:eu-repo/grantAgreement/Fondap/15010003
dc.relation.uri.none.fl_str_mv https://www.aanda.org/articles/aa/abs/2011/04/aa16188-10/aa16188-10.html
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
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