SUMMARY OF PROPOSAL 41266
DR SHIGERU MIYOSHI
KYOTO SANGYO UNIVERSITY
KYOTO JAPAN 603
KYOTO
KAMIGAMO-MOTOYAMA, KITA-KU

  E-mail: MIYOSHI@ASCA.KYOTO-SU.AC.JP	Tel: 075-705-1609	Fax: 075-705-1640
  Medium: 2.5GB8MM

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: MEASURING THE HUBBLE CONSTANT USING X-RAY AND SUNYAEV-ZEL'DOVICH OBSERVATIONS   


Abstract:
 We are engaged in a fundamental programme to determine the Hubble constant by
 physical means, using X-ray observations of clusters of galaxies in conjunction with
 Ryle Telescope (RT) images of the Sunyaev-Zel'dovich decrements towards them. We
 have already obtained suitable observations of one cluster, A2218, finding H_0=38
 +18/-16 km s^{-1} Mpc^{-1}. We now have RT images for several more clusters,
 including two, A697 and A1914, which do not have X-ray spectral temperature
 measurements. We therefore seek the ASCA observations which are absolutely critical for establishing the value of H_0.

 Co-Is:
   1  MASAKAZU MATSUURA   	KYOTO SANGYO UNIV.            JAPAN     
      (No Co-I contact data)
   2  TAISUKE TSURUTA     	KYOTO SANGYO UNIV.            JAPAN     
   3  KOUJUN YAMASHITA    	NAGOYA UNIV.                  JAPAN     
   4  YUZURU TAWARA       	NAGOYA UNIV.                  JAPAN     
   5  AKIHIRO FURUZAWA    	NAGOYA UNIV.                  JAPAN     
   6  ANTHONY LASENBY     	UNIV. OF CAMBRIDGE            UK        
   7  RICHARD SAUNDERS    	UNIV. OF CAMBRIDGE            UK        
   8  MICHAEL JONES       	UNIV. OF CAMBRIDGE            UK        
   9  ALISTAIR EDGE       	UNIV. OF CAMBRIDGE            UK        
  10  ISAMU HATSUKADE     	MIYAZAKI UNIV.                JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
ABELL 697              1  130.7371   36.3614    60   N   Y   P  0.28000   1 
          
ABELL 1914             1  216.5087   37.8247    40   N   Y   P  0.80000   1