SUMMARY OF PROPOSAL 42178
DR. CHRISTINE A. JONES
SMITHSONIAN INSTITUTION ASTROPHYSICAL OBSERVATORY
MA USA 02138
CAMBRIDGE
60 GARDEN ST.

  E-mail: CJF@CFA.HARVARD.EDU	Tel: 617 495 7137	Fax: 617 495 7356
  Medium: 4GBDAT

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: EVOLUTION OF X-RAY LUMINOUS CLUSTERS                                            


Abstract:
 We propose to study a ``complete'' set of distant ($z\approx 0.3-0.4$) luminous
 ($L_x \approx 10^{45}$ ergs s$^{-1}$ or greater) clusters which complements the
 generally less luminous sample of EMSS clusters at $z\approx 0.3$ observed with
 ASCA. The proposed clusters represent the extreme upper end of the cluster
 luminosity function and will probe the nature of the negative evolution reported for
 the cluster X-ray luminosity function. We propose to measure the temperature and
 heavy element abundance in the intracluster medium for a comparison with the most
 luminous present epoch clusters. With 8 clusters we can make a meaningful initial
 comparison of the properties of present epoch and distant clusters and compute a high redshift cluster temperature distribution function.

 Co-Is:
   1  RICHARD BURG        	JOHNS HOPKINS                 USA       
      (No Co-I contact data)
   2  HANS BOHRINGER      	MPE                           GERMANY   
   3  WOLFGANG VOGES      	MPE                           GERMANY   
   4  MAXIM MARKEVITCH    	UNIV. OF VIRGINIA             USA       


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
1230.8+3440            0  187.7000   34.6667    20   N   N   P  0.50000   1 
          
1354.9+7715            0  208.7250   77.2500    20   N   N   P  0.50000   1