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   PR # 41195
   We propose a 60 ks ASCA observation of the Seyfert 2 galaxy Mrk 3.
   The heavily absorbed X-ray continuum of this galaxy shows a large
   amplitude variability on a timescale of a few years. Previous
   observations suggest the strong iron K line (EW = 500-1000 eV) has
   changed in response to the continuum variation. Mrk 3 is the only
   object knwon, showing such significant continuum and line flux
   variation. Our main aim of this observation is to follow the
   long-term continuum variability, and to measure the accompanying line
   flux change, in order to address a location of the line emitter.
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