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   62128
   It has never been unambiguously established whether the X-ray absorber
   in Seyfert 2 galaxies is variable. Some tentative claims have been made
   to this effect, but these have been based either upon comparison
   between observations made by different X-ray detectors, or based upon
   data from instruments with a large field-of-view, where contaminating
   X-ray sources cast doubt on the origin of the spectral variability. The
   moderate spatial resolution and good spectral resolution of ASCA allow
   us the opportunity to establish absorption variability in a Seyfert 2
   galaxy. We propose to monitor NGC 526A, which has shown marked X-ray
   spectral variability in the past.
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