OPTEXT -- Uses the fitted profile from PROFIT to optimally extract
spectrum from the frame.
OPTEXT just applies the usual optimal weights. All the hard part has been
done by PROFIT
Parameters:
IMAGE -- The data file for extraction.
FLAT -- balance frame
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 sky/object region limits.
SKY -- Contains fits to the background sky in the region of
the object.
TRACK -- Contains trace of the position of the spectrum from TRACE
FRACT -- Contains fit to profile from PROFIT
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.
ZAPRATS -- .TRUE. then outlying points are ignored. Should not be used
if profile does not represent frame to be extracted (e.g.
arc or sky frame)
If ZAPRATS
RATLO -- Lower outlier zap threshold if ZAPRATS = .TRUE.
RATHI -- Upper outlier zap threshold if ZAPRATS = .TRUE.
EPS -- Fudge factor to avoid silly rejections. On high signal-to-noise
data you can get very close fits but still be several sigma out.
EPS imposes a lower limit to the fractional deviation required
for a point to be rejected.
IAVE -- Number of sky pixels to average over in low count cases
PLOT -- .TRUE. if you want to plot
DEVICE -- Plot device
This command belongs to the classes: extract , tilted