ECHOMOP has special facilities for particular detector-dependent problems. In particular, for CCDs and similar detectors, the data may become obscured by cosmic-ray events over a long exposure. The package provides 2 methods of identifying and flagging such pixels.
CCDs also necessitate the provision of a number of extra pieces of information to the reduction process. Care must be taken to ensure these values are accurate as they can have a severe impact upon the resultant spectrum.
For the IPCS detector, the frames can be highly distorted in both X- and Y-directions. The package provides for a detailed 2-D polynomial fit to be made to the distortions present in each order.
Martin Clayton