Optical Sky Flats
PLEASE MAKE SURE THE TELESCOPE IS TRACKING.
We need at least 5 seconds per exposure, and 3 exposures for each filter. Michelle recommends 20,000 - 22,000 counts to achieve good S/N and avoid non-linear effects.
PLEASE SHIFT THE TELESCOPE BETWEEN THE FLATS (including the flats
of the same filter).
Optical sky flats will be grouped as U,R,I or B,V. The queue
manager will specify which skyflats are needed on a given night.