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<H1><A NAME="SECTION0027130000000000000000"> </A>
<A NAME="echelle_reduction_summary"> </A>
<BR>
Summary of reduction options
</H1>
<P>
The two following diagrams summarise the successive steps performed
by high-level procedures <TT>RESPONSE/ECHELLE</TT> and <TT>REDUCE/ECHELLE</TT>
depending on the main options:
<P>
<UL>
<LI>Flat-field correction can be performed or not
<LI>Instrumental response correction can be skipped, or performed
using either a standard-star or IUE-like methods.
</UL>
<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="response-echelle-scheme"> </A><A NAME="25964"> </A>
<TABLE WIDTH="50%">
<CAPTION><STRONG>Figure D.1:</STRONG>
Response/Echelle</CAPTION>
<TR><TD><IMG
WIDTH="1039" HEIGHT="463"
SRC="img976.gif"
ALT="\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}"></TD></TR>
</TABLE>
</DIV>
<BR>
<P>
<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="reduce-echelle-scheme-1"> </A><A NAME="25978"> </A>
<TABLE WIDTH="50%">
<CAPTION><STRONG>Figure D.2:</STRONG>
Reduce/Echelle (1)</CAPTION>
<TR><TD><IMG
WIDTH="988" HEIGHT="394"
SRC="img977.gif"
ALT="\begin{figure}
\begin{center}
\begin{tabular}{\vert c\vert c\vert}
\hline
\mu...
...ield \\
(Merge) & (Merge) \\
\hline
\end{tabular} \end{center} \end{figure}"></TD></TR>
</TABLE>
</DIV>
<BR>
<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="reduce-echelle-scheme-2"> </A><A NAME="25997"> </A>
<TABLE WIDTH="50%">
<CAPTION><STRONG>Figure D.3:</STRONG>
Reduce/Echelle (2)</CAPTION>
<TR><TD><IMG
WIDTH="1043" HEIGHT="429"
SRC="img978.gif"
ALT="\begin{figure}
\begin{center}
\begin{tabular}{\vert c\vert c\vert}
\hline
\mu...
...PLE/ECH} \\
Merge & Merge \\
\hline
\end{tabular} \end{center} \end{figure}"></TD></TR>
</TABLE>
</DIV>
<BR>
<P>
<BR><HR>
<ADDRESS>
<I>Petra Nass</I>
<BR><I>1999-06-15</I>
</ADDRESS>
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