Detector controller

In principle, the noise properties of the detector are mildly better when using Amplifier B instead of A when reading out the detector. However, there are problems with the geometry of windows when using Amplifier B as this was not implemented in the detector controller when it was delivered. A solution to circumvent this and make the geometry commands produce the correct windows for amplifier B was made. Further changes to geometry related FITS keywords as used by specific observing applications (e.g., spectroscopic target acquisition) is needed before this Amplifier option can be offered.

Some structure was noted in data taken with a binning by 2 in the X direction on the detector. This pattern is stable, and can be corrected in the reduction. It is believe the pattern is caused by some specific settings in the controller which can be adjusted.

Thomas Augusteijn 2013-12-02