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Summary of reduction options

The two following diagrams summarise the successive steps performed by high-level procedures RESPONSE/ECHELLE and REDUCE/ECHELLE depending on the main options:

Flat-field correction can be performed or not
Instrumental response correction can be skipped, or performed using either a standard-star or IUE-like methods.

**Figure D.1:** Response/Echelle
$\begin{figure} \begin{center} \begin{tabular}{\vert c\vert c\vert} \hline \mu... ...ply by the blaze flat-field \\ \hline \end{tabular} \end{center} \end{figure}$

**Figure D.2:** Reduce/Echelle (1)
$\begin{figure} \begin{center} \begin{tabular}{\vert c\vert c\vert} \hline \mu... ...ield \\ (Merge) & (Merge) \\ \hline \end{tabular} \end{center} \end{figure}$

**Figure D.3:** Reduce/Echelle (2)
$\begin{figure} \begin{center} \begin{tabular}{\vert c\vert c\vert} \hline \mu... ...PLE/ECH} \\ Merge & Merge \\ \hline \end{tabular} \end{center} \end{figure}$

Petra Nass
1999-06-15