Move your mouse over the picture to see the numbers of the spot groups.
These two images were taken with slightly different exposures. The upper image has the slightly longer exposure
(actually gain at 15% compared to 7% for the lower image). This has made the lighter parts of the picture
relatively less dark but reveals the ring around the biggest spot. At one time I suspected these rings were processing
artifacts, but in this case it is visible (albeit parhaps not quite so sharply) in the raw frames. The lower image
brings out better some of the fainter detail around the main spot. The small spot to the lower right is not part of
group 10757.
Date and Time
29th April 2005 11:42 (top image) and 11:33 and 11:36 UT (lower images)
Camera
ToUcam 740K
Telescope
270 mm SLR lens and ETX125 at prime focus
Capture
K3CCDTools. Whole Sun: Low gamma, 1/250", 11% gain
Spots: Low gamma, 1/250", 7% and 15% gain Processing
Registax. Wavelets 1,2 = 10 (whole Sun), 1-3=10 (spots)
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