ESP has been modified to be aware of the World Coordinate System (WCS) components of NDFs.
The COSYS parameter has been removed from all ESP applications, so that all user input and output is now in the Current co-ordinate system of the NDF. The Current co-ordinate system is a characteristic of the WCS component of the NDF. Thus, instead of setting COSYS to use either 'Data' or 'World' co-ordinate sytems, you should now set the Current frame of the NDF's WCS component (e.g. using KAPPA's WCSFRAME apllication) to the desired co-ordinate system before running the ESP application.
Output to data files is however in Base (WCS GRID frame) co-ordinates, which are pixel co-ordinates guaranteed to start at (1,1).
For NDFs which have a WCS component with a SKY frame in it, the PSIZE parameter (pixel size in arc seconds) is now determined automatically rather than being solicited from the user. This can be overridded by specifying it on the command line.
ESP applications which generate output NDFs from input NDFs now propagate the WCS component where appropriate.
ESP --- Extended Surface Photometry