************************************************************************* 51145 We propose an ASCA observation of NGC4151 simultaneous with XTE. Because of strong absorption in this object, the simultaneous ASCA/XTE measurement of the profile of the K-alpha line will be much more accurate than it is possible with ASCA alone. It will also determine, for the first time, the line profile TOGETHER with the Compton- reflection and intrinsic spectrum. This will allow us to test for the presence of an accretion disk as well as to constrain its inclination. *************************************************************************