IAU01644
Presentation type requested: ORAL
SUBARU SUPRIME-CAM WEAK LENSING SURVEY OVER 33 SQUARE DEG
Satoshi Miyazaki
Subaru telescope
Clusters of galaxies provide a powerful cosmological tool because they are the most massive bound objects in the universe. The comparison of the observed mass function of clusters to theoretical predictions place strong constraints on the theory of structure formation and on the geometry of the universe. Until now however, cluster catalogs have been derived from light (either optical or X-ray) and are compromised by selection biases and by uncertain assumptions about the physical states of clusters. Therefore, a homogeneous cluster catalog whose members are selected by mass has long been awaited for. Weak lensing permits to detect the mass concentration, regardless of their physical state, and provide such a mass selected cluster catalog. The large demands on field of view and on image quality have made such program difficult until now. We have, however, demonstrated that the newly developed Suprime-Cam on 8-m Subaru telescope is uniquely capable of blind searches of mass concentration via weak lensing. We then propose to extend the lens survey up to 33 square degree where archival X-ray data is available. Five nights are allocated for the first half year beginning April 2003. We will present the observing strategy of the survey and the status.
Hamana Takashi , Ellis Richard S, Alexandre Refregier , Futamase Toshifumi , Umetsu Keiichi , Ikebe Yasushi , Takahashi Tadayuki , Kashikawa Nobunari
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