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A ACIS Grades

  As described in Section 3.3.2, ACIS candidate X-ray events are assigned to grades based on the number and orientation of the pixels neighboring the central candidate pixel which exceed the split event threshold. In order to better visualize the patterns corresponding to a particular grade the following figure has been prepared.

Table A.1: ACIS Grade Description
\psfig {figure=PSUplots/grades.eps,height=7.7in,angle=180}\end{table}

John Nousek