ALFOSC flat field images
............. This page is currently under construction ..........
2004 dome flat
summer 2009 twilight flat
Click on the images to see details.
Check the
ALFOSC flatfield archive for dome flats in fits format.
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i#12 dome flat 11-2009 |
Combined ALFOSC i(#12)-band twilight flat with
cuts set to +-14% of the median level.
This is a median of 9 dome flats from 21-11-2009, with the median
count level about 36k ADUs.
Individual frames have been de-biased.
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R#76 dome flat 11-2009 |
Combined ALFOSC R(#76)-band twilight flat with
cuts set to +-10% of the median level.
This is a median of 5 dome flats from 21-11-2009,
with the median
count level about 44k ADUs.
Individual frames have been de-biased.
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V#75 dome flat 12-2009 |
Combined ALFOSC V(#75)-band twilight flat with
cuts set to +-7% of the median level.
This is a median of 9 dome flats from 09-12-2009
with the median
count level about 19k ADUs.
Individual frames have been de-biased.
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B#74 dome flat 12-2009 |
Combined ALFOSC B(#74)-band twilight flat with
cuts set to +-6% of the median level.
This is a median of 7 dome flats from 09-12-2009, with the median
count level about 19k ADUs.
Individual frames have been de-biased.
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