DIAGNOSTIC:
Occasionally a very energetic cosmic ray will produce more than
the usual dot or streak.
In this image the hit is in the lower right quadrant. Notice the streak
leading up to the hit, the halo around the hit, and Mr. Staypuft
streaks induced by the hit. This image has been processed with an old
flat field and linearity and mask files as well as showing uncorrected
pedestal. CALNICA has clipped out the saturated part of the cosmic ray hit.
CURE:
It is possible to partially mitigate
the effects of such a hit by only using those reads of a multiaccum
sequence that preceded the hit, but this can limit the exposure time
for the region in question. Once the region is saturated, the data
cannot be recovered.