I R A F  
                    Image Reduction and Analysis Facility
PACKAGE = imfit
   TASK = imsurfit

input   =            image_fit  Input images to be fit
output  =  image_fit_normalise  Output images
xorder  =                    1  Order of function in x
yorder  =                    1  Order of function in y
(type_ou=             response) Type of output (fit,residual,response,clean)
(functio=             legendre) Function to be fit (legendre,chebyshev,spline3)
(cross_t=                   no) Include cross-terms for polynomials?
(xmedian=                    1) X length of median box
(ymedian=                    1) Y length of median box
(median_=                  50.) Minimum fraction of pixels in median box
(lower  =                   0.) Lower limit for residuals
(upper  =                   0.) Upper limit for residuals
(ngrow  =                    0) Radius of region growing circle
(niter  =                    0) Maximum number of rejection cycles
(regions=               circle) Good regions (all,rows,columns,border,sections,c
(rows   =                    *) Rows to be fit
(columns=                    *) Columns to be fit
(border =                   50) Width of border to be fit
(section=                     ) File name for sections list
(circle =         1043 990 925) Circle specifications
(div_min=                INDEF) Division minimum for response output
(mode   =                   ql)