Algorithms exist to optimally subtract the sky background from 2D spectra that account for optical distortions and other effects. These effects create non-linear relations between spatial/wavelength coordinates and pixel-based detector coordinates. Careful mapping of these effects allow one to build a sky background model with sub-pixel resolution. One such method is described in Kelson (2003). That algorithm should be implemented in specreduce and possible updates explored.
Algorithms exist to optimally subtract the sky background from 2D spectra that account for optical distortions and other effects. These effects create non-linear relations between spatial/wavelength coordinates and pixel-based detector coordinates. Careful mapping of these effects allow one to build a sky background model with sub-pixel resolution. One such method is described in Kelson (2003). That algorithm should be implemented in
specreduceand possible updates explored.