/usr/lib/iraf/extern/rvsao/contsum3.par is in iraf-rvsao 2.8.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | # CONTSUM3 - Third parameter set for SUMSPEC continuum removal (RVSAO 2.3)
c_interactive,b,h,no,,,"Fit continuum interactively?"
c_sample,s,h,"*",,,"Sample of points to use in fit"
c_start,i,h,1,,,"First pixel for this continuum model"
c_function,s,h,"spline3","spline3|legendre|chebyshev|spline1",,"Fitting function
(spline3|legendre|chebyshev|spline1)"
naverage,i,h,1,,,"Number of points in sample averaging"
order,i,h,10,1,,"Order of fitting function"
s_low_reject,r,h,2.,0.,,"Input spectrum continuum low rejection in sigma of fit"
s_high_reject,r,h,2.,0.,,"Input spectrum continuum high rejection in sigma of fit"
niterate,i,h,10,0,,"Number of rejection iterations"
grow,r,h,1.,0.,,"Rejection growing radius"
mode,s,h,"ql"
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