High Resolution spatial analysis of a z $\sim$ 2 lensed galaxy using
  adaptive coadded source-plane reconstruction
  We present spatially resolved analysis of a lensed galaxy, SDSS1958+5950 at
$z = 2.225$, from the Cambridge Sloan Survey of Wide Arcs in the Sky
(CASSOWARY). We use our new high resolution imaging data to construct a robust
lens model for the galaxy group at $z = 0.214$. We employ the updated lens
model to combine the Integral Field Spectrographic observations on two highly
distorted images of the lensed target. We adopt a forward-modeling approach to
deconvolve the effects of point spread function from the combined source-plane
reconstruction. The approach is adapted to the lens model magnification and
enables a resolution of $\sim$170 pc in the galaxy-source plane. We propose an
ongoing merger as the origin of the lensed system on the basis of its
source-plane morphology, kinematics and rest-frame emission line ratios. Using
our novel technique of adaptive coadded source plane reconstruction, we are
able to detect different components in the velocity gradient that were not seen
in previous studies of this object, plausibly belonging to different components
in the merging system.
