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   51046
   Accretion Disk Corona Source X0921-630 has a very long orbital period
   of 9 day and exhibits a partial eclipse lasting about 1 day. We
   detected a significant broad emission line at 6.7 keV with both SIS and
   GIS during the eclipse. Because of the long orbital period and relative
   faintness of the source, no observations of a complete orbital cycle
   yet exist in either the X-ray or optical bands. Almost observations
   (EXOSAT, Ginga and ASCA) performed around eclipse. So, we propose
   observation of X0921-630 in other phases. We investigate the relation
   of hight and temperature of the Accretion Disk Corona with the
   comparison of spectral and X-ray flux in other phases. Also, we can
   constrain the emission region of Fe line with the comparison of other
   phases.
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