Weak-Lensing Mass Calibration of the Atacama Cosmology Telescope
  Equatorial Sunyaev-Zeldovich Cluster Sample with the Canada-France-Hawaii
  Telescope Stripe 82 Survey
  Mass calibration uncertainty is the largest systematic effect for using
clusters of galaxies to constrain cosmological parameters. We present weak
lensing mass measurements from the Canada-France-Hawaii Telescope Stripe 82
Survey for galaxy clusters selected through their high signal-to-noise thermal
Sunyaev-Zeldovich (tSZ) signal measured with the Atacama Cosmology Telescope
(ACT). For a sample of 9 ACT clusters with a tSZ signal-to-noise greater than
five the average weak lensing mass is
$\left(4.8\pm0.8\right)\,\times10^{14}\,\mathrm{M}_\odot$, consistent with the
tSZ mass estimate of $\left(4.70\pm1.0\right)\,\times10^{14}\,\mathrm{M}_\odot$
which assumes a universal pressure profile for the cluster gas. Our results are
consistent with previous weak-lensing measurements of tSZ-detected clusters
from the Planck satellite. When comparing our results, we estimate the
Eddington bias correction for the sample intersection of Planck and
weak-lensing clusters which was previously excluded.
