Although explicit support for extraction of extended objects is not provided in this release, it is possible to use the package to extract an increment at a time. To do this normal extraction should first be performed to obtain a reliable sky model.
Then the ech_spatial option/task should be used to mask out all object increments except one. The extraction should then be re-done and the resulting spectrum copied into a section of a user-created data array using KAPPA image processing facilities.
This procedure needs repeating for each increment required and could be automated using a command file.
Martin Clayton