SUMMARY OF PROPOSAL 41260
MR TAKUYA IMAYOSHI
FACULTY OF SCIENCE, OSAKA UNIVERSITY
OSAKA JAPAN 560
TOYONAKA
MACHIKANEYAMA-CHO 1-1

  E-mail: IMAYOSHI@ESS.SCI.OSAKA-U.AC.JP	Tel: 06-850-5476	Fax: 06-850-5539
  Medium: 2.5GB8MM

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: OBSAVATION OF GRAVITATIONAL LENSING CLUSTERS OF GALAXIES                        


Abstract:
 It is known some clusters of galaxies have arclike images by gravitational lens-
 ing. Now we can derive the mass of clusters from their arcs.It reflects the total
 mass contained in the lensing system,independent of the specific matter contents and
 states.Our aimis to compare the dynamical masses from hydrostatic equilibrium with
 the gravitational masses from arclike images of background galaxies and to estimate
 the difference of these two results for undestanding the mass distribution of the
 cluster of galaxies.To achieve this aim we will propose the observation of galaxyclusters with luminous arcs,MS1455+2232 and MS1910.5+6736.

 Co-Is:
   1  KIYOSHI HAYASHIDA   	OSAKA UNIVERSITY              JAPAN     
      HAYASIDA@ESS.SCI.OSAKA-U.AC.JP	06-850-5476
   2  HIROKI CHIHARA      	OSAKA UNIVERSITY              JAPAN     
   3  KIYOSHI HASHIMOTODANI	OSAKA UNIVERSITY              JAPAN     
   4  TAKASHI TONERI      	OSAKA UNIVERSITY              JAPAN     
   5  YOSHIAKI OHNO       	OSAKA UNIVERSITY              JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
MS1455+2232            3  224.3129   22.3417    40   N   N   P  0.26700   1