Flats, Arcs and Standard Stars

A standard IFU observation sequence consists of a flat and an arc, followed by observations of the target. The flat is required for reducing all other IFU observations for flat fielding and for locating the positions of the slices on the array. The flat is therefore a mandatory observation for all IFU data reduction. The arc is required to scrunch all rows of on-sky observations to a common wavelength scale (note that calibration files for the Krypton lamp are not available at present - please use only the argon lamp for the time-being).

It may sometimes be necessary or convenient to postpone observation of a standard-star until after observing your object. In this case it is possible to run the _NOSTD versions of the recipes, then re-run the data reduction once the standard has been observed and reduced.