calgorithm,s,h,"none","|centroid|gauss|none|ofilter|",,Centering algorithm
cbox,r,h,5.0,,,Centering box width in scale units
cthreshold,r,h,0.0,,,Centering threshold in sigma above background
minsnratio,r,h,1.0,0.0,,Minimum signal-to-noise ratio for centering algorithim
cmaxiter,i,h,10,,,Maximum iterations for centering algorithm
maxshift,r,h,1.0,,,Maximum center shift in scale units
clean,b,h,no,,,Symmetry clean before centering
rclean,r,h,1.0,,,Cleaning radius in scale units
rclip,r,h,2.0,,,Clipping radius in scale units
kclean,r,h,3.0,,,K-sigma rejection criterion in skysigma
mkcenter,b,h,no,,,Mark the computed center
mode,s,h,'ql'