Dec 17, 2002

Here are the COS geometrically corrected ground flatfield images
for the FUV01 and FUV02 detectors. Each file is an IDL savefile 
with three variables

EXT_HEADER      STRING    = Array[105]
FF_FILES        STRING    = Array[108]
MIMAGE          UINT      = Array[16001, 601]

EXT_HEADER is an example FITS header from one of the
FF_FILES flatfields, which have beem merged into MIMAGE.

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January 15, 2003 

Added fits files containing the FUV02 flatfield images (seg[A,B]_02_flat.fits).

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January 16, 2003 

The following files,

FUV01_A_pfull.png
FUV01_B_pfull.png
FUV02_A_pfull.png
FUV02_B_pfull.png

are linearly scaled, thermally and geometrically corrected flatfield images.
These images have been compressed by a factor of 4 in the dispersion direction
to achieve the correct physical scales. Defects at the edges are due to
poor geometric correction.

The following files,

FUV01_A_residual.png
FUV02_A_residual.png
FUV02_B_residual.png

show the residuals after dividing the first half of the flatfield dataset
(~60 images) by the other half for each detector for ~25% of the detector length.
These images indicating that the features seen in the flatfield images are
indeed fixed pattern noise, and therefore should be removable in the calibration process.

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spenton@casa.colorado.edu