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   PR #    53
   Science: Rho-Ophiuchi (Rho-Oph) is one of the nearest star-forming
   region,whose X-ray emission is considered as low mass pre-main
   sequence stars (PMSs)origin. The X-ray flare has been observed
   frequentry, and from its spectra andtime scales the emission mechanism
   of X-ray is thaught as magnetic processwhich is similer to that of the
   Sun. At the central region of Rho-Oph, thereexists a moleculer cloud
   and no emission has been observed from there byprevious soft X-ray
   spatial observations; however, hard X-ray emission may beobserved
   through the cloud because of its high transmissivity.Calibration:
   There exists a lot of X-ray emitting stars in Rho-Oph. Therefore,the
   observation of this region can test the ability of separating crowded
   pointsources each other.
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