Running REDUCE/CCD

  The command REDUCE/CCD can process one or more science frame automatically provided:

• the association table correctly describes the associations between the science frames and the calibration frames;
• the CCD reduction table or the SC_... keywords contains the correct names of the master calibration frames;
• the keywords for creating the calibration frames are correctly set.

REDUCE/CCD will first identify the association and reduction tables. From the reduction table it gets the names of the input and output science frames. Next, it will try to find the master calibration frames listed in the reduction table, and will create these if they do not exist yet. After having collected all required calibration data the input frame is checked for its exposure type. Obviously, a dark frame should not be flat fielded and hence the processing options for the dark exposures should be set differently than for the science frames. After having determined the processing options the actual processing starts.

• Overscan correction and trimming
• Bias, Dark and Flat Field Correction