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Image name: Eclipse_of_Corona.png (click image to enlarge)
Image size: 40.9180 KB (512x512)
Date submitted: 17-Nov-1993
CORONAL ECLIPSE IMAGE This image shows the difference between two SXT images obtained during the "coronal eclipse" of Nov. 13, 1993. The bright red part of the difference image shows the smooth radial fall-off of coronal brightness at the heliographic SW limb of the Sun. The differencing allows for a cancellation of the stray light and dark current in the SXT images, and gives the clearest possible view of the faint coronal brightness. The complicated structure of residual brightness on the solar disk (top of image) results from a small change in telecope pointing in the eight minutes between images. At the time of the reference image, the Moon was at the bottom of the image and is invisible against the coronal brightness.