"Function = spline3" and "order=3600" appear to be safe
parameters for correcting for occasional bias jumps.
Regardless, applying such
values will not hurt the outcome, and will correct problematic frames.
We have also debated the use of fixpix-ing versus no fixpix-ing. Because
our ultimate goal is 1% photometry, pixel-fixing is questionable, as
the photometry will be affected by interpolation over bad pixels, and
information about bad pixels is not preserved in any of the IRAF
photometry routines. However, fixpixing is a plus in the early
application of 'ccdproc' since later interpolation methods('sinc') will
propagate and intensify un-fixed bad pixels.
PACKAGE = mscred
TASK = ccdproc
images = obj*fits List of Mosaic CCD images to process
(output = ) List of output processed images
(bpmasks= ) List of output bad pixel masks
(ccdtype= object) CCD image type to process
(noproc = no) List processing steps only?
(xtalkco= yes) Apply crosstalk correction?
(fixpix = yes) Apply bad pixel mask correction?
(oversca= yes) Apply overscan strip correction?
(trim = yes) Trim the image?
(zerocor= yes) Apply zero level correction?
(darkcor= no) Apply dark count correction?
(flatcor= yes) Apply flat field correction?
(sflatco= no) Apply sky flat field correction?
(merge = yes) Merge amplifiers from same CCD?
(xtalkfi= xtalkphil.dat) Crosstalk file
(fixfile= bp*) List of bad pixel masks
(saturat= INDEF) Saturated pixel threshold
(sgrow = 0) Saturated pixel grow radius
(bleed = INDEF) Bleed pixel threshold
(btrail = 20) Bleed trail minimum length
(bgrow = 0) Bleed pixel grow radius
(biassec= image) Overscan strip image section
(trimsec= image) Trim data section
(zero = Zerona.fits) List of zero level calibration images
(dark = ) List of dark count calibration images
(flat = master*.fits) List of flat field images
(sflat = ) List of secondary flat field images
(minrepl= 1.) Minimum flat field value
(interac= no) Fit overscan interactively?
(functio= spline3) Fitting function
(order = 3600) Number of polynomial terms or spline pieces
(sample = *) Sample points to fit
(naverag= 1) Number of sample points to combine
(niterat= 1) Number of rejection iterations
(low_rej= 3.) Low sigma rejection factor
(high_re= 3.) High sigma rejection factor
(grow = 0.) Rejection growing radius
(fd = )
(fd2 = )
(mode = ql)