  Anomalous flux ratios between quasar images are suspected to be caused by
substructures in lens galaxies. We present new deep and high resolution H and
Ks imaging of the strongly lensed quasar SDSS J0924+0219 obtained using the ESO
VLT with adaptive optics and the Laser Guide Star system. SDSS J0924+0219 is
particularly interesting as the observed flux ratio between the quasar images
vastly disagree with the predictions from smooth mass models. With our adaptive
optics observations we find a luminous object, Object L, located ~0.3" to the
North of the lens galaxy, but we show that it can not be responsible for the
anomalous flux ratios. Object L as well as a luminous extension of the lens
galaxy to the South are seen in the archival HST/ACS image in the F814W filter.
This suggests that Object L is part of a bar in the lens galaxy, as also
supported by the presence of a significant disk component in the light profile
of the lens galaxy. Finally, we do not find evidence for any other luminous
substructure that may explain the quasar images flux ratios. However, owe to
the persistence of the flux ratio anomaly over time (~ 7 years) a combination
of microlensing and milli-lensing is the favorite explanation for the
observations.
