SUMMARY OF PROPOSAL 43014
DR COEL HELLIER
KEELE UNIVERSITY
STAFFORDSHIRE UK ST55BG
KEELE


  E-mail: CH@ASTRO.KEELE.AC.UK	Tel: +44 1782 584243	Fax: +44 1782 711093
  Medium: 2GBDAT

Subject: CATACLYSMIC VARIABLES                                       
  Title: SPIN-RESOLVED X-RAY SPECTROSCOPY OF THE FIRST DISKLESS INTERMEDIATE POLAR       


Abstract:
 11 intermediate polars have so far been observed with ASCA. However, all of these
 are systems which accrete through an accretion disk. The recently discovered system
 RX1712-24 is the first known intermediate polar without a disk, so the accretion
 stream impacts directly onto the magnetosphere. It will flip between the magnetic
 poles on the beat cycle, probably breaking up into chaotic blobs. Such blobs might
 survive until they bury into the white dwarf. The light curve and spectral
 characteristics of RX1712-24 are expected to be very different as a result. We
 propose the first hard X-ray observation of such a system - a prime opportunity to
 observe an entirely new phenomenon in accretion physics.

 Co-Is:
   1  MANABU ISHIDA       	ISAS                          JAPAN     
      (No Co-I contact data)
   2  KOJI MUKAI          	GSFC                          USA       
   3  RYUICHI FUJIMOTO    	ISAS                          JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
RX1712-24              1  258.1500  -24.2447    80   N   Y   P  1.00000   1