SUMMARY OF PROPOSAL 43013
DR JULIAN PAUL OSBORNE
UNIVERSITY OF LEICESTER
LEICS UK LE1 7RH
LEICESTER
UNIVERSITY ROAD

  E-mail: JULO@STAR.LE.AC.UK	Tel: (+44)-116-2523598	Fax: (+44)-116-2523311
  Medium: 2GB8MM

Subject: CATACLYSMIC VARIABLES                                       
  Title: THE COMPLEX X-RAY SPECTRUM OF EF ERI                                            


Abstract:
 We propose a second ASCA observation of the X-ray bright polar, EF Eri, to be
 simultaneous with an already accepted XTE observation. The initial ASCA observation
 is insufficient for this purpose as the accretion geometry in these systems (and
 hence their X-ray emission) can change dramatically, and in fact the existing ASCA
 PV data show EF Eri in an unusual state, with a second dip in its phase-folded
 lightcurve. Simultaneous data are essential in order to build a reliable composite
 broad band spectrum, with unprecedented spectral coverage from 0.4-40 keV, enabling
 the continuum shape, reflection spectrum, complex continuum absorption and emission line properties to be studied in detail.

 Co-Is:
   1  CHRISTINE DONE      	DURHAM UNIV                   UK        
      CHRIS.DONE@DURHAM.AC.UK	(+44)-191-3742129
   2  MANABU ISHIDA       	ISAS                          JAPAN     
   3  KOJI MUKAI          	GSFC                          USA       


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
EF ERI                 3   48.5546  -22.5950    80   N   N   P  1.00000   1 

REMARKS:  WE HAVE XTE TIME, AND WILL APPLY FOR EUVE. WE WANT THESE OBSNS TO BE
          SIMULTANEOUS. EF ERI IS VISIBLE TO XTE ALL YEAR, BUT EUVE SIMULTANEITY CAN
          ONLY BE ACHIEVED DURING 1995 DEC 27 - 1996 JAN 28.