UFTI Flatfielding Test Data

We want to use UFTI test data to get a better handle on the flat field properties of the array/telescope system, and investigate the various contributions of fringing and dust to the background. We also want to investigate whether it will be possible in principle to take twilight flats with WFCAM, or whether the window of opportunity is too short. Additionally we propose a microstepping experiment to see how well we will be able to reconstruct such images, especially with variable seeing.

This is our wish list:

• A set of twilight flats in J, H and K spanning the full dynamic range of the detector. We need to see at what point the fringing and dust emission is blown away by the background sky and how long of a window of opportunity there is to obtain the flats.
• A set of dome flats in J, H, and K again spanning the full dynamic range of the detector.
• Some exposures in a galactic plane region in all three colours for the microstepping experiment. The idea is to bin the data 4x4 in order to get roughly the same pixel size as we're expecting for WFCAM. So the offsets should be an odd multiple of 2 number of pixels (say 46 or 50 pixels).