[en] We report results from a large set of multi-wavelength images of the quadruply imaged quasar RXS J1131-1231. We show images of this system and of the Einstein ring from the visible to the near infrared. We infer from these images an improved astrometry and we compare various simple models. Based on the flux variations observed in various filters during a 1.5 year period, we deduce two likely microlensing scenarios. Finally, we try to explain the observed chromatic variations of the flux ratios and we discuss the occurence of a flux ratio anomaly in this system.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Sluse, Dominique ; Université de Liège - ULiège > Institut d'Astrophysique et de Géophysique > AEOS
Language :
English
Title :
Multiwavelength and multi-epoch imaging of RXS J1131-1231
Publication date :
December 2004
Event name :
25 Years After the Discovery: Some Current Topics on Lensed QSOs
Event organizer :
25 Years After the Discovery: Some Current Topics on Lensed QSOs
