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Flat Fielding

Once the flat field has been prepared in the manner described above, the astronomical images may be flat fielded simply by dividing by the flat field. This part of the process is similar to that for optical CCDs.

To do the flat fielding in MIDAS, use either COMPUTE/CCD to divide the sky subtracted images by the flat field frame, or use the command FFIELD/IRAC2 to perform the same operation.

Petra Nass