<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 98.1p1 release (March 2nd, 1998) originally by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>Retrieving demonstration and calibration data</TITLE> <META NAME="description" CONTENT="Retrieving demonstration and calibration data"> <META NAME="keywords" CONTENT="vol2"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <LINK REL="STYLESHEET" HREF="vol2.css"> <LINK REL="next" HREF="node149.html"> <LINK REL="previous" HREF="node147.html"> <LINK REL="up" HREF="node146.html"> <LINK REL="next" HREF="node149.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html3299" HREF="node149.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html3296" HREF="node146.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html3290" HREF="node147.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html3298" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="icons.gif/contents_motif.gif"></A> <BR> <B> Next:</B> <A NAME="tex2html3300" HREF="node149.html">General Description</A> <B> Up:</B> <A NAME="tex2html3297" HREF="node146.html">Echelle Reduction Method</A> <B> Previous:</B> <A NAME="tex2html3291" HREF="node147.html">Input Data and Preprocessing</A> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION001112000000000000000"> Retrieving demonstration and calibration data</A> </H2> <P> Calibration tables are required to provide reference values of wavelength for Th-Ar arc lamp lines, atmospheric extinction or standard star fluxes. <P> A certain number of tables are distributed on request in complement to the Midas releases. These tables are also available on anonymous ftp at the host <B>ftphost.hq.eso.org</B> (IP number 134.171.40.2). The files to be retrieved are located in the directory /midaspub/calib and are named README.calib and calib.tar.Z. Command <TT>SHOW/TABLE</TT> can be used to visualize the column name and physical units of the tables. Demonstration data required to execute the tutorial procedure <TT>TUTORIAL/ECHELLE</TT> are also located on this ftp server in the directory /midaspub/demo as echelle.tar.Z. FTP access is also provided on the World Wide Web URL: <BR> <DIV ALIGN="CENTER"> <B>http://http.hq.eso.org/midas-info/midas.html</DIV> </B> <BR> The calibration directory contains other information such as characteristic curves for ESO filters and CCD detectors, which can be visualized with the Graphical User Interface XFilter (command <TT>CREATE/GUI FILTER</TT>). <P> <BR> <DIV ALIGN="CENTER"><A NAME="fig:ech-red"> </A><A NAME="7117"> </A> <TABLE WIDTH="50%"> <CAPTION><STRONG>Figure 7.1:</STRONG> Echelle Reduction Scheme</CAPTION> <TR><TD><IMG WIDTH="940" HEIGHT="778" SRC="img272.gif" ALT="\begin{figure} \begin{center} \begin{tabular}{\vert cccc\vert} \hline & & & ... ...& & MERGE ORDERS \\ & & & \\ \hline \end{tabular} \end{center} \end{figure}"></TD></TR> </TABLE> </DIV> <BR> <P> <HR> <!--Navigation Panel--> <A NAME="tex2html3299" HREF="node149.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html3296" HREF="node146.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html3290" HREF="node147.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html3298" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="icons.gif/contents_motif.gif"></A> <BR> <B> Next:</B> <A NAME="tex2html3300" HREF="node149.html">General Description</A> <B> Up:</B> <A NAME="tex2html3297" HREF="node146.html">Echelle Reduction Method</A> <B> Previous:</B> <A NAME="tex2html3291" HREF="node147.html">Input Data and Preprocessing</A> <!--End of Navigation Panel--> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>