next up previous contents
Next: Removing Irrelevant Columns Up: CCD Detectors Previous: Discussion

   
Reduction Steps

The software now available is a package for doing relative calibrations of the pixels, for averaging frames, and for cleaning images. Cleaning in this context means removal of instrumental faults and other defects from the images. A list of the relevant commands is provided for reference in the section B.1.10 of this appendix.

The CCD-reduction involves the steps outlined below. Steps in paranthesis [...] are optional but see the following discussion to determine if they are optional in your particular case.

The sections below describe and discuss the various options which are available to perform the needed operations. These sections discuss bias corrections, techniques for computing averages, techniques for cleaning images and removing specific defects, and finally how to use the COMPUTE command for dark subtraction and flat fielding.


next up previous contents
Next: Removing Irrelevant Columns Up: CCD Detectors Previous: Discussion
http://www.eso.org/midas/midas-support.html
1999-06-15