A 2-D Worked Example

As there may be readers who have come to this section without reading the worked 1-D example I will reiterate a number of instructions. If you are familiar with the early steps please feel free to skip on.

Before you start the extraction you will have to do the detector-specific preparation of your data (most likely to remove CCD-related effects). If you have not done this, refer to Image Preparation for an outline of the procedure, and Other Sources of Information for pointers to documentation of the process.