Combining strong and weak lensing estimates in the Cosmos field
  We present a combined cosmic shear analysis of the modeling of line-of-sight
distortions on strongly lensed extended arcs and galaxy shape measurements in
the COSMOS field. We develop a framework to predict the covariance of strong
lensing and galaxy shape measurements of cosmic shear on the basis of the small
scale matter power-spectrum. The weak lensing measurement is performed using
data from the COSMOS survey calibrated with a cloning scheme using the Ultra
Fast Image Generator UFig (Berge 2013). The strong lensing analysis is
performed by forward modeling the lensing arcs with a main lensing deflector
and external shear components from the same Hubble Space Telescope imaging data
set. With a sample of three strong lensing shear measurements we present a
2-sigma detection of the cross-correlation signal between the two complementary
measurements of cosmic shear along the identical line of sight. With large
samples of lenses available with the next generation ground and space based
observatories, the covariance of the signal of the two probes with large
samples of lenses allows for systematic checks, cross-calibration of either of
the two measurement and the measurement of the small scale shear
power-spectrum.
