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   PR # 41026
   With the PV phase observation of the Rho-Oph dark cloud, we found
   hard X-ray emission from embedded infrared sources, which may be
   protostars ( pre-stage of T- Tauri star). One of the hard source WL6
   shows sinusoidal variation indicating rapid rotation of the
   protostar. Our proposal is to establish this sinusoidal variation and
   determine the spin period by X-rays. Higher spatial resolution
   observation (observe at on axis position) to resolve source confusion
   and to search for X-rays from a younger object in the Rho-Oph cloud
   is also proposed.
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