A New Estimate of Galaxy Mass-to-Light Ratios from Flexion Lensing
  Statistics
  We perform a flexion based weak gravitational analysis of the first two
Hubble Frontier Field clusters: Abell 2744 and MACS 0416. A parametric method
for using projected flexion signals as a probe of cluster member mass is
described in detail. The normalization and slope of a $L-\theta_E$ (as a proxy
for $L-\sigma$) scaling relation in each cluster is determined using measured
flexion signals. A parallel field analysis is undertaken concurrently to
provide a baseline measure of method effectiveness. We find an agreement in the
Faber-Jackson slope $\ell$ associated with galaxy age and morphology for both
clusters, as well as theoretical distinction in the cluster normalization mass.
