Title:

Subaru Suprime-Cam Weak Lensing Survey 
and HyperSuprime-Cam



Satoshi Miyazaki
Subaru Telescope



Abstract:

Weak gravitational lensing directly measures the mass
distribution of clusters, regardless of their physical
state, and thus can provide a mass-selected cluster catalog
which is useful for cosmology.  In our pilot weak lensing
cluster search in a GTO 2 deg$^2$ field, we had indeed
several mass concentration with a significant signal
(S/N$>5$) (Miyazaki et al. 2002). Those are well correlated
with light distributions and some of them are
spectroscopically identified as clusters of galaxies. This
demonstrated that the weak lensing survey is practical with
Suprime-Cam. We are currently expanding the survey area so
that our sample contains about 80 to 100 clusters. We will
present current status of the survey.

In addition to the lensing survey, we will introduce our new
instrumentation plans including fully depleted CCDs
developed in collaboration with Hamamatsu Photonics and
Subaru's next generation wide field camera: HyperSuprime. We
also mention Gemini's WFMOS project, with which we started
discussion about a possible collaboration.