The description of CCD reductions is divided into four parts. Section describes the ideas behind the relative calibration of 2--dimensional photometric CCD--images.
Section gives a description of the steps required to perform a relative calibration of the CCD and discusses the various MIDAS commands that are available to perform the required operations. Section provides some examples of typical reduction scenarios. Section is a summary of the relevant commands.
The procedures described in the manual will yield CCD--frames whose pixel values represent relative flux from one to the other. In order to proceed to calibrate the images in terms of magnitudes requires further steps not detailed here.