Title: A quadruply imaged quasar with an optical Einstein ring candidate: 1RXS J113155.4-123155
Authors: Sluse, D ×
Surdej, J
Claeskens, JF
Hutsemekers, D
Jean, Christophe
Courbin, F
Nakos, T
Billeres, M
Khmil, SV #
Issue Date: Aug-2003
Publisher: E d p sciences
Series Title: Astronomy & astrophysics vol:406 issue:2 pages:L43-L46
Abstract: We report the discovery of a new quadruply imaged quasar surrounded by an optical Einstein ring candidate. Spectra of the different components of 1RXS J113155.4-123155 reveal a source at z = 0.658. Up to now, this object is the closest known gravitationally lensed quasar. The lensing galaxy is clearly detected. Its redshift is measured to be z = 0.295. Additionally, the total V magnitude of the system has varied by 0.3 mag between two epochs separated by 33 weeks. The measured relative astrometry of the lensed images is best fitted with an SIS model plus shear. This modeling suggests very high magnification of the source (up to 50 for the total magnification) and predicts flux ratios between the lensed images significantly different from what is actually observed. This suggests that the lensed images may be affected by a combination of micro or milli-lensing and dust extinction effects.
ISSN: 1432-0746
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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