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   PR # 41167
   ASCA and Ginga observations of Mrk 509 find evidence for a broad iron
   K(alpha) line and strong reflection component. Both may originate in
   a relativistic accretion disk, but there is currently no direct
   evidence to physically link them. We propose 16-10 ksec ASCA
   monitoring observations coordinated with approved XTE and IUE
   observations to simultaneously measure the UV and X-ray continua,
   iron line and reflection tail. Monitoring the response of the
   putative reprocessing components to primary continuum variability
   will constrain the geometry and provide a key test of reprocessing
   models. Bright across the UV/X-ray band and strongly variable on
   moderate time scales, Mrk 509 is an ideal target for this key test,
   which is feasible only in the current AO when both ASCA and IUE are
   operating.
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