PACKAGE = apphot
   TASK = fitskypars

(salgori=             constant) Sky fitting algorithm
(annulus=                11.22) Inner radius of sky annulus in scale units
(dannulu=                   5.) Width of sky annulus in scale units
(skyvalu=                   0.) User sky value
(smaxite=                   10) Maximum number of sky fitting iterations
(sloclip=                   0.) Lower clipping factor in percent
(shiclip=                   0.) Upper clipping factor in percent
(snrejec=                   50) Maximum number of sky fitting rejection iteratio
(sloreje=                   3.) Lower K-sigma rejection limit in sky sigma
(shireje=                   3.) Upper K-sigma rejection limit in sky sigma
(khist  =                   3.) Half width of histogram in sky sigma
(binsize=                  0.1) Binsize of histogram in sky sigma
(smooth =                   no) Boxcar smooth the histogram
(rgrow  =                   0.) Region growing radius in scale units
(mksky  =                   no) Mark sky annuli on the display
(mode   =                   ql)