Hundreds of weak lensing shear-selected clusters from the Hyper
  Suprime-Cam Subaru Strategic Program S19A data
  We use the Hyper Suprime-Cam Subaru Strategic Program S19A shape catalog to
construct weak lensing shear-selected cluster samples. From aperture mass maps
covering $\sim 510$~deg$^2$ created using a truncated Gaussian filter, we
construct a catalog of 187 shear-selected clusters that correspond to mass map
peaks with the signal-to-noise ratio larger than 4.7. Most of the
shear-selected clusters have counterparts in optically-selected clusters, from
which we estimate the purity of the catalog to be higher than 95\%. The sample
can be expanded to 418 shear-selected clusters with the same signal-to-noise
ratio cut by optimizing the shape of the filter function and by combining weak
lensing mass maps created with several different background galaxy selections.
We argue that dilution and obscuration effects of cluster member galaxies can
be mitigated by using background source galaxy samples and adopting the filter
function with its inner boundary larger than about $2'$. The large samples of
shear-selected clusters that are selected without relying on any baryonic
tracer are useful for detailed studies of cluster astrophysics and cosmology.
