This recipe reduces a single IFU arc frame to a form that can be used to generate an arc lines list file. These are static calibration files stored in $ORAC_DATA_CAL/grisms/, which should rarely need to be re-generated.
Read-noise and Poisson variances are added to the frame and a bad pixel mask is applied. The spectrum from each slice of the IFU is cut out of the frame and pasted in a new frame in such a way that there are no longer spaces between the spectra, the spectra are arranged in the order in which they appear in the field of view and they are approximately aligned in the dispersion direction. The spectrum is flat-fielded.
ORAC-DR -- integral field spectroscopy data reduction