SUMMARY OF PROPOSAL 41231
DR. KA YAMASHITA
CHIBA UNIVERSITY
CHIBA JAPAN 263



  E-mail: YAMASITA@TANPOPO.IPC.CHIBA-U.AC.JP	Tel: 043-290-3544	Fax: 043-290-3544
  Medium: 2.5GB8MM

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: GIANT LUMINOUS ARC STATISTICS WITH PRECISE X-RAY DATA OF ALL CLUSTERS OF GALAXIES IN LE FEVRE ET AL. ARC SURVEY SAMPLE


Abstract:
 Though statistics of the giant luminous arcs gives a powerful gravitational lens
 method to examine the mass distribution of distant galaxy clusters, the arc
 statistics only cannot constrain lens models enough to determine galaxy clusters
 mass distribution precisely. However, X-ray temperature and image observations will
 give good constraints to the mass distribution model before detailed gravitational
 lens modeling by the arc statistics. We have already planned ROSAT HRI observations
 to get X-ray images for all the sample clusters of Le Fevre et al. (1994)'s first
 systematic arc survey. X-ray temperature measurements by ASCA are strongly desired about the same complete sample.

 Co-Is:
   1  MAKOTO HATTORI      	MPE GARCHING                  GERMANY   
      (No Co-I contact data)
   2  KAZUYA WATANABE     	NIIGATA UNIV.                 JAPAN     
   3  YASUSHI IKEBE       	RIKEN                         JAPAN     
   4  TAKESHI TSURU       	KYOTO UNIV.                   JAPAN     
   5  HANS B\"OHRINGER    	MPE GARCHING                  GERMANY   
   6  SABINE SCHINDLER    	MPE GARCHING                  GERMANY   
   7  JEAN-PAUL KNEIB     	IOA CAMBRIDGE                 UK        
   8  RICHARD BOWER       	UNIV. OF DURHAM               UK        


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
          
MS1006+1202            3  152.1892   11.8042    20   N   Y   P  0.12000   1