In going from the raw 2D images to the 1D extractions produce by the QL Tool:
* The x axis is flipped so that increasing wavelength runs in the same direction as increasing x
* The spectra are then trimmed to remove overscan, etc. Remember: the WLC is only good to a couple of A. No rectification or spectral tracing has been performed. The arc extraction is the single, ''central'' row, and may not correpsond to the same spatial location as your science target.
== For IRAF users ==