\begin{itemize} \item[1.] Get source time serie. \item[2.] Check time serie integrity. \item[3.] Get original event list. \item[4.] Check events list integrity. \item[5.] Create time binning. \item[6.] Apply relative corrections to source time serie. \item[7.] Calculate errors. \item[8.] Create corrected light curve. \end{itemize} Extensions: \begin{itemize} \item[6a:] Absolute corrections. \begin{itemize} \item [.1] Calculate spectrum. \item [.1] Call arfgen. \item [.2] Apply absolute corrections. \end{itemize} \item[6b:] Introduce background time serie. \begin{itemize} \item [.1] Check background binning. \item [.2] Apply background relative corrections. \item [.3] Normalise background to source collection area. \item [.4] Substract background time serie. \end{itemize} \item[7a.] Check for more initial time series. \begin{itemize} \item [.1] Repeat points 4, 5 and 6. \end{itemize} \item[7b:] Copy intermediate results to a file. \end{itemize}