infile,s,a,"./tmp/acis_evt2_filtered.fits[sky=region(a6.reg)][cols chipx, chipy, ccd_id, x, y]",,,"Input file specification"
centroid,b,h,yes,,,"Calculate centroid if image?"
median,b,h,no,,,"Calculate median value?"
sigma,b,h,yes,,,"Calculate the population standard deviation?"
clip,b,h,no,,,"Calculate stats using sigma clipping?"
nsigma,r,h,3,,,"Number of sigma to clip"
maxiter,i,h,20,1,,"Maximum number of iterations"
mode,s,h,"ql",,,