****************************************************** PR # 64 We expect to obtain both calibration and scientific information from this observation of the low-mass X-ray binary EXO 0748-676. Calibration goals include the investigation of dead-time and photon pile-up effects and a simultaneous ROSAT observation with which to cross-calibrate Asuka response. Scientific objectives include the investigation of the possible triple nature of this system, a search for line emission and continuum absorption features, and detailed spectral modeling of eclipse, dipping, burst and quiescent spectra. To maximize the science return it is is desirable to observe as many eclipses as possible. ******************************************************