EXTNOR -- normal extraction routine by summation across object region.
'extnor' requires an estimated sky region from 'skyfit' and will
estimate uncertainties according to parameters of a noise model.
Bad pixels: Any bad pixel in the data, balance or sky fit frames
will casue the respective row to be lost.
IMAGE -- The data file for extraction.
FLAT -- Contains balance factors which when multiplied into
the data correct for short scale sensitivity
variations.
DLOAD -- TRUE if dark frame is required.
DARK -- Dark frame representing counts unaffected by slit
profile. This will be subtracted off data before applying
the balance factors.
REGION -- Contains the object region limits. This file should
have been generated by 'regpic' or 'skymov'.
SKY -- Contains fits to the background sky in the region of
the object. Produced by 'skyfit'.
TRACE -- True if you want to include a poly fit to the X position of
the spectrum (made with 'track').
If TRACE
TRACK -- Name of poly fit distortion map file
SPECT -- The output file for both the spectrum and the uncertainty
estimates.
YSTART,YEND -- The Y pixel limit of the extraction.
READOUT -- The readout noise of the detector in RMS data units/pixel
PHOTON -- The number of photons per data number.
This command belongs to the classes: tilted , extract