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Notes from CCD Session 92 (S00092) Sky Condition Graph Sky Brightness Survey Master Flat >
Sky Condition Graphs for Observing Session 92 |
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Master Flat (Dusk Sky Flats near Zenith, with TeeShirt) |
11 x 20s (average combine), clear
filter, -15 deg C 2005-08-14 (#92001-11) |
Master Flat (TeeShirt Flats against illuminated board in Observatory) Noise levels are much lower in this Master Flat Attempt (due to brighter incident light and higher number of frames used), however lighting is considered to non-uniform, leading to the bright spot being more off-centre. The possible impact of mirror flop can not be ruled out . |
20 x 20s (average combine), clear
filter, - 5 deg C 2005-08-14 (#90114-33) |
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This Web Page: | CCD Image Notes - (2005-08-14) |
Last Updated : | 2015-05-16 |
Site Owner : | David Richards |
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