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   81751
   NGC 6300 is a nearby Seyfert 2 galaxy. The observation with RXTE
   revealed that hard X-ray emission from NGC 6300 is described by a pure
   reflectionmodel (Leighly et al. 1999, ApJ, 522, 209). This spectrum
   indicates that the X-ray emission from nucleus is completely blocked by
   thick matter.  NGC6300 was observed with SAX 2.5 years after the RXTE
   observation. The spectrum is dramatically changed from that with RXTE
   (Leighly et al. 2000, RXTE meeting March 23-25). Since spectral
   variability gives us valuable informations on the structure of an AGN,
   we propose a monitoring observation of NGC 6300 with ASCA.
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