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Effect of SAA on Dark Signal

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Date submitted: 25-Aug-1993

EFFECT of SAA on DARK SIGNAL
 
Thanks to a table mistake in August 1993 we took many
QR darkframe SLD monitor images for a couple of orbits.
These are DPE=13 exposures with the shutter closed and
the AlMg filter in place.  As part of an effort to
learn what effects SXT dark signal I came upon these
examples of SAA passage.  The red cross-hatched
regions are the SAAs.  The overall dark signal is
increased by 5 percent in these 78 ms exposures.

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