We have taken both domeflats and twilight flats in the first run. We have used only domeflats in the reduction so far (December 2008), with a large-scale illumination correction derived from observations of the open cluster M67. The current flats, and the procedures used to determine them, are given on the wiki page.

There is an issue with the K-band domeflats. They are almost certainly saturated, and we should use shorter integration times in the second run. We have not yet inspected twilight flats, or variation in the dome-flats over the course of the first run.

In the second run we should again take "1000 points of light" test images, on M67 or another cluster. A denser pattern than done before would make the analysis easier. We did 8x8; 10x10 or 12x12 would give a denser and higher S/N map of the sensitivity.