SUMMARY OF PROPOSAL 41032
DR. MANABU ISHIDA
INSTITUTE OF SPACE AND ASTRONAUTICAL SCIENCE
KANAGAWA JAPAN 229
SAGAMIHARA
3-1-1 YOSHINODAI

  E-mail: ISHIDA@ASTRO.ISAS.AC.JP	Tel: 0427-51-3911	Fax: 0427-59-4253
  Medium: 4GBDAT

Subject: CATACLYSMIC VARIABLES                                       
  Title: A NEW AM HER TYPE VARIABLE, RX J1802.1+1804, DISCOVERED BY ROSAT                


Abstract:
 RX J1802+1804 is a newly ROSAT detected AM Her binary. It has been optically
 identified with a V=15 mag object which shows no optical eclipses. The X-ray and
 optical periodicity at 113 min, and the presence of a strong blackbody component
 strongly supports the AM Her nature. The ROSAT spectrum also clearly show the
 well-known bremsstrahlung component, whose temperature, however, cannot be
 constrained. We ask for a 80 ksec ASCA observation of this new, bright AM Her
 variable in order to 1) determine the temperature of the hard component and the
 corresponding white dwarf mass, 2) approach the soft X-ray problem by measuring the hard X-ray flux accurately.

 Co-Is:
   1  RYUICHI FUJIMOTO    	ISAS                          JAPAN     
      FUJIMOTO@ASTRO.ISAS.AC.JP	0427-51-3911
   2  KEIICHI MATSUZAKI   	UNIVERSITY OF TOKYO           JAPAN     
   3  JOCHEN GREINER      	MPE                           GERMANY   
   4  C. MOTCH            	CDS                           FRANCE    


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
RX J1802+1804          2  270.5267   18.0781    80   N   N   P  0.12000   1