| Telescope | MDM 1.3m |
| Date | 11/21/97 |
| Instrument | Echelle CCD |
| Filter | NA |
| Exposure Time |
0 sec |
Problem:The gradient of the zero second exposure does not show the same large scale structure or other features as the images which have dark current. |
Fix:Cool down the CCD or take dark images (take exposures with the shutter closed). |
15 sec Twilight flat with different structure
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