DAOSKY: DAOPHOT SKY Command

Form: DAOSKY im [BOX=b] [3SIG]
im
is the image number on which sky is to be determined
BOX=b
specfies VISTA box to do calculation in

Returns DAOPHOT's estimate of the modal sky value, or alternatively, an iterated, 3-sigma rejected mean if the 3SIG keyword is given. It can be instructive to compare these with other VISTA estimates ( SKY, WSKY). It is hard to get a good sky value!