SUMMARY OF PROPOSAL 41279
DR. KAZUYA WATANABE
NIIGATA UNIVERSITY
NIIGATA JAPAN 950-21

8050 IGARASHI-2

  E-mail: KAZUYA@TH.PHYS.TITECH.AC.JP	Tel: 043-290-3544	Fax: 043-290-3544
  Medium: 2.5GB8MM

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: LOOK FOR A REDSHIFTED IRON K-LINE FROM VERY HIGH REDSHIFT CLUSTER OF GALAXIES USING ASCA AND GRAVITATIONAL TELESCOPE


Abstract:
 The cluster of galaxies Cl0024+17 is a unique object at a redshift of 0.39 since
 there is a certain evidence of the existence of the backgroud cluster of galaxies at
 a redshift of higher than 1 which is significantly magnified by lensing effect of
 Cl0024+17. Our simulation shows that the gravitational magnification due to
 Cl0024+17 makes the redshifted iron-line from the background cluster observable,
 which is otherwise hard to detect. We propose the first attack to search for X-ray
 emission from very distant cluster of galaxies using a foreground rich cluster of galaxies as a gravitational telescope.

 Co-Is:
   1  MAKOTO HATTORI      	MPE GARCHING                  GERMANY   
      (No Co-I contact data)
   2  Y. MELLIER          	OBSERV. TOULOUSE              FRANCE    
   3  YASUSHI IKEBE       	RIKEN                         JAPAN     
   4  JEAN-PAUL KNEIB     	IOA CAMBRIDGE                 UK        
   5  HANS B\"OHRINGER    	MPE GARCHING                  GERMANY   
   6  SABINE SCHINDLER    	MPE GARCHING                  GERMANY   
   7  YASUO TANAKA        	ISAS                          JAPAN     
   8  U.G. BRIEL          	MPE GARCHING                  GERMANY   
   9  KOHJUN YAMASHITA    	UNIV. OF NAGOYA               JAPAN     
  10  D.M. NEUMANN        	MPE GARCHING                  GERMANY   


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
CL0024+17              3    6.6354   17.1619    40   N   Y   P  0.02000   1