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<H2><A NAME="SECTION001332000000000000000">
Initialisation of the Keywords</A>
</H2>
<P>
These keywords are relative to the CLOUD context and can be handled by the
usual commands (<TT>READ/KEY</TT>.....).
<P>
They are required to run the programs:
<P><P>
<BR>
<DIV ALIGN="CENTER">
<!-- MATH: $\fbox{\tt CREATE/PSF \ COMPUTE/ABS \ COMPUTE/EMI}$ -->
<IMG
WIDTH="426" HEIGHT="31" ALIGN="BOTTOM" BORDER="0"
SRC="img380.gif"
ALT="\fbox{\tt CREATE/PSF \ COMPUTE/ABS \ COMPUTE/EMI}"></DIV>
<P><P>
<BR>
They define the output image dimensions, the coefficients of the polynomial
continuum, the redshift of the source, and the type of absorption profile
(Maxwellian or Voigtian). Their format is described in section Auxiliary
Data.
<P>
Ex. command:
<P><P>
<BR>
<DIV ALIGN="CENTER">
<!-- MATH: $\fbox{\tt CLDDIM(1) = 3500 \ \ CLDDIM(2) = 0.5 \ \ CLDDIM(3) = 200}$ -->
<IMG
WIDTH="562" HEIGHT="31" ALIGN="BOTTOM" BORDER="0"
SRC="img381.gif"
ALT="\fbox{\tt CLDDIM(1) = 3500 \ \ CLDDIM(2) = 0.5 \ \ CLDDIM(3) = 200}">
<BR>
</DIV>
<P><P>
<BR>
Sets the synthetic image dimensions to: <BR>
<DIV ALIGN="CENTER">
Start point 3500 Å, step size 0.5 Å, number of pixels 200 <BR>
</DIV>
<P><P>
<BR>
<DIV ALIGN="CENTER">
<!-- MATH: $\fbox{\tt CLDZ(1) = 2.48}$ -->
<IMG
WIDTH="174" HEIGHT="31" ALIGN="BOTTOM" BORDER="0"
SRC="img382.gif"
ALT="\fbox{\tt CLDZ(1) = 2.48}">
<BR>
</DIV>
<P><P>
<BR>
Sets the redshift of the source to 2.48
<BR>
<P><P>
<BR>
<DIV ALIGN="CENTER">
<!-- MATH: $\fbox{\tt CLDCT(1) = 1}$ -->
<IMG
WIDTH="104" HEIGHT="31" ALIGN="BOTTOM" BORDER="0"
SRC="img383.gif"
ALT="\fbox{\tt CLDCT(1) = 1}">
<BR>
</DIV>
<P><P>
<BR>
Defines a flat continuum
<BR>
<P><P>
<BR>
<DIV ALIGN="CENTER">
<!-- MATH: $\fbox{\tt CLDOP(1) = 1}$ -->
<IMG
WIDTH="151" HEIGHT="31" ALIGN="BOTTOM" BORDER="0"
SRC="img384.gif"
ALT="\fbox{\tt CLDOP(1) = 1}">
<BR>
</DIV>
<P><P>
<BR>
Indicates that the absorption coefficients will be computed according to the
Voigt Formula.
<P>
<BR><HR>
<ADDRESS>
<I>Petra Nass</I>
<BR><I>1999-06-15</I>
</ADDRESS>
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