NACO

The scope of the recipes is similar to that for ISAAC. No attempt has been made to reduce any coronographic data with the standard recipes.

Registration is critical for such small point-spread functions to match well. Thereforet he minimum number of contigous pixels above the threshold to be counted as a fiducial source for automatic registration is increased from 9 to 15, and the percentile detection threshold raised from 98% to 99%. These may need further adjustment as a wider selection of observations are processed. The sky co-ordinates are used to aid registration by default.

Aperture photometry accesses both the UKIRT Faint-standard and Persson HST lists.