SUMMARY OF PROPOSAL 43015 DR SIMON RICHARD ROSEN UNIVERSITY OF LEICESTER LEICS. UK LE1 7RH LEICESTER UNIVERSITY RD. E-mail: SRR@STAR.LE.AC.UK Tel: UK-116-2522077 Fax: UK-116-2523311 Medium: 4GBDAT Subject: CATACLYSMIC VARIABLES Title: THE BEHAVIOUR AND PROPERTIES OF THE HARD X-RAY COMPONENT IN QS TEL Abstract: We propose to make the first measurements of the medium energy X-ray spectrum in the AM Her star, QS Tel, which apparently undergoes relatively frequent changes of its accretion geometry. Using ASCA our key objectives are: 1) to measure the hitherto essentially unquantified medium energy spectral distribution - this will constrain the flux ratio of the hard and soft spectral components which is related to the homogeneity of the accreting material, b) monitor anticipated changes in the X-ray l Co-Is: 1 JULIAN OSBORNE LEICESTER UK JULO@STAR.LE.AC.UK UK-116-2523598 2 MANABU ISHIDA ISAS JAPAN 3 MIKE WATSON LEICESTER UK 4 ANDY LAYDEN MCMASTER CANADA 5 DAVID BUCKLEY SAAO S AFRICA 6 RICHARD LIEU U. OF ALABAMA USA 7 STEVE HOWELL PSI USA 8 MARTIN SIRK CEA USA 9 JON MITTAZ MSSL UK Target Name PRI RA Dec Time TC Off GIS SIS_Cts Obs ------------------- --- -------- -------- ---- -- --- --- ------- --- QS TEL 2 294.6483 -46.2158 20 Y Y P 0.26000 3 Monitored Oservation: Min. Int: 2592.000 Max. Int: 14256.000