COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses
V. ChantryInstitut d’Astrophysique et de Géophysique, Université de Liège, Bat. B5C, Allée du 6 Août, 17, 4000 Sart Tilman, Liège 1, BelgiumDominique SluseAstronomisches Rechen-Institut am Zentrum für Astronomie der Universitat at Heidelberg, Mönchhofstrasse 12-14, 69120 Heidelberg, GermanyPierre MagainInstitut d’Astrophysique et de Géophysique, Université de Liège, Bat. B5C, Allée du 6 Août, 17, 4000 Sart Tilman, Liège 1, Belgium
2010en
ABI
Аннотация
Aims. We attempt to place very accurate positional constraints on seven gravitationally lensed quasars currently being monitored by the COSMOGRAIL collaboration, and shape parameters for the light distribution of the lensing galaxy. We attempt to determine simple mass models that reproduce the observed configuration and predict time delays. We finally test, for the quads, whether there is evidence of astrometric perturbations produced by substructures in the lensing galaxy, which may preclude a good fit with the simple models.
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