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Date submitted: 16-Nov-1995
DARK SPIKE VARIATION Just a figure to remind everyone that there is a great deal of short time scale variation in CCD dark signal these days. This plot shows the changes in 7 FR pixels of a PFI 1x2 dark frame with DPE=28 over a one hour period. I have chosen the 7 pixels with the largest variation out of the 8192 pixels in the image. So, in percentage area the effect is small it should be kept in mind when looking for changes in single-pixel features. L. Acton 11/16/95