SUMMARY OF PROPOSAL 43039
PROFESSOR ANDREW C FABIAN
UNIVERSITY OF CAMBRIDGE
ENGLAND UK CB3 0HA
CAMBRIDGE
MADINGLEY ROAD

  E-mail: ACF@AST.CAM.AC.UK	Tel: +44 1223 337509	Fax: +44 1223 337523
  Medium: 4GBDAT

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: ASCA OBSERVATIONS OF THE NEARBY X-RAY BRIGHT GALAXY CLUSTER AROUND 3C129.1      


Abstract:
 The galaxy cluster around the compact radio galaxy 3C129.1 is the ninth-brightest
 cluster in the sky in the 2-10 keV band. Because of its low Galactic latitude it has
 been little studied at optical or X-ray wavelengths. In fact it is the only cluster
 of the brightest thirty that has yet to be observed with ASCA. Previous X-ray
 imaging observations of the 3C129.1 cluster did not allow the amount of cooling in
 the intra-cluster medium to be determined with satisfactory precision. Thanks to the
 cluster's X-ray brightness the ASCA observation proposed here will provide spectra
 of exceptional quality which will enable us to search spectrally for cooling
 components. The proposed observation will also allow us to measure the X-ray flux from the well-known twin-tailed radio source 3C129.

 Co-Is:
   1  ALASTAIR EDGE       	IOA, CAMBRIDGE                UK        
      ACE@AST.CAM.AC.UK	+44 1223 330803
   2  HARALD EBELING      	IOA, CAMBRIDGE                UK        
   3  STEVE ALLEN         	IOA, CAMBRIDGE                UK        
   4  DAVID WHITE         	IOA, CAMBRIDGE                UK        
   5  RODERICK JOHNSTONE  	IOA, CAMBRIDGE                UK        


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
3C129.1 CLUSTER        3   72.5429   45.0401    20   N   N   P  2.54000   1