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CCDInspector analysis of 5, 5 minute calibrated light frames of the M57 region.   | ||
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One of the 5 star field images. It have been dark, flat and bias calibrated and stretched a little. The CCDInspector analysis was performed on calibrated but unstretched frames. Here is a TIF if you want to do more analysis. | |
| Main panel | ![]() |
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Curvature analysis reports 21% field curvature. | |
| 3-D curvature map. | ![]() |
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