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UFTI Flatfielding Test Data
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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).
Simon Hodgkin (sth @ ast.cam.ac.uk)
Last modified: Fri Apr 4 17:35:14 BST 2003