PACKAGE = apphot
   TASK = centerpars

(calgori=             centroid) Centering algorithm
(cbox   =                  10.) Centering box width in scale units
(cthresh=                   0.) Centering threshold in sigma above background
(minsnra=                   1.) Minimum signal-to-noise ratio for centering algo
(cmaxite=                   10) Maximum number of iterations for centering algor
(maxshif=                   1.) Maximum center shift in scale units
(clean  =                   no) Symmetry clean before centering ?
(rclean =                   1.) Cleaning radius in scale units
(rclip  =                   2.) Clipping radius in scale units
(kclean =                   3.) Rejection limit in sigma
(mkcente=                   no) Mark the computed center on display ?
(mode   =                   ql)
($nargs =                    0)