Data Reduction Frequently Asked Questions
How can I improve the sky correction of my STARE data?
Depending on the observations (for instance in crowded fields), you may have to change the windows in the slit where the sky is determined (sky-position1/2 and sky-hheight1/2). By default the pipeline uses all parts of the slit not covered by the object extraction window (localize-slit-position and localize-slit-hheight) and not masked by sky-slit-edges-mask to fit the sky.
Alternatively you can try the BSPLINE method and vary its parameters.