

Spectral extractions will be made with heights less than the default size to isolate targets with small separations along the slit, or individual rows in a rectified spectral image of an extended target will be analyzed.The _flt images must be aligned before they can be combined with ocrreject. These exposures are not associated and are thus not combined in pipeline processing.
Signal path reset for recalibration series#


More appropriate reference files have become available since the data were taken.There are a number of reasons why it may be desirable to recalibrate your data. Sometimes the default pipeline calibration, performed shortly after the data were obtained from the telescope, is not the best possible calibration for your science program.
